diff --git a/rpi/config.py b/rpi/config.py
new file mode 100644
index 0000000..548b2ab
--- /dev/null
+++ b/rpi/config.py
@@ -0,0 +1,25 @@
+PIN = 18  # GPIO18 (hardware PWM) for WS2812B on RPi4
+
+PANEL_PIXEL_COUNT = 16
+PANEL_COUNT = 3
+NUMPIXELS = PANEL_PIXEL_COUNT * PANEL_PIXEL_COUNT * PANEL_COUNT  # 768
+DISPLAY_MAX_X = PANEL_PIXEL_COUNT * PANEL_COUNT - 1              # 47
+DISPLAY_MAX_Y = PANEL_PIXEL_COUNT - 1                            # 15
+
+TEXT_MAX_LENGTH = 64
+MAX_TEXT_NODES_COUNT = 4
+MAX_IMAGES_SAVED = 2
+MAX_ANIMATION_FRAME_COUNT = 12
+MAX_ANIMATIONS_COUNT = 2
+
+# 0xFF111111 in NeoPixel = R=0x11, G=0x11, B=0x11 (W byte ignored on GRB strip)
+VEHICLE_COLOR = (17, 17, 17)
+
+SMALL_TEXT_HEIGHT = 7
+SMALL_TEXT_WIDTH = 5
+MEDIUM_TEXT_HEIGHT = 7
+MEDIUM_TEXT_WIDTH = 5
+
+PROGRAM2_TEXT_ITERATIONS = 5
+PROGRAM2_TRIGGER_CHANCE = 25
+PROGRAM2_VEHICLE_COUNT = 25
diff --git a/rpi/fonts.py b/rpi/fonts.py
new file mode 100644
index 0000000..771177e
--- /dev/null
+++ b/rpi/fonts.py
@@ -0,0 +1,196 @@
+T = True
+F = False
+
+# font7x5[ascii - 32][row 0..6][col 0..4]
+FONT_7X5 = [
+    # ' ' (32)
+    [[F,F,F,F,F],[F,F,F,F,F],[F,F,F,F,F],[F,F,F,F,F],[F,F,F,F,F],[F,F,F,F,F],[F,F,F,F,F]],
+    # ! (33)
+    [[F,F,T,F,F],[F,F,T,F,F],[F,F,T,F,F],[F,F,T,F,F],[F,F,T,F,F],[F,F,F,F,F],[F,F,T,F,F]],
+    # " (34)
+    [[F,T,F,T,F],[F,T,F,T,F],[F,T,F,T,F],[F,F,F,F,F],[F,F,F,F,F],[F,F,F,F,F],[F,F,F,F,F]],
+    # # (35)
+    [[F,T,F,T,F],[F,T,F,T,F],[T,T,T,T,T],[F,T,F,T,F],[T,T,T,T,T],[F,T,F,T,F],[F,T,F,T,F]],
+    # $ (36)
+    [[F,F,T,F,F],[F,T,T,T,T],[T,F,T,F,F],[F,T,T,T,F],[F,F,T,F,T],[T,T,T,T,F],[F,F,T,F,F]],
+    # % (37)
+    [[T,T,F,F,T],[T,T,F,F,T],[F,F,F,T,F],[F,F,T,F,F],[F,T,F,F,F],[T,F,F,T,T],[T,F,F,T,T]],
+    # & (38)
+    [[F,T,T,F,F],[T,F,F,T,F],[T,F,F,T,F],[F,T,T,F,F],[T,F,T,F,T],[T,F,F,T,F],[F,T,T,F,T]],
+    # ' (39)
+    [[F,F,T,F,F],[F,F,T,F,F],[F,F,T,F,F],[F,F,F,F,F],[F,F,F,F,F],[F,F,F,F,F],[F,F,F,F,F]],
+    # ( (40)
+    [[F,F,F,T,F],[F,F,T,F,F],[F,T,F,F,F],[F,T,F,F,F],[F,T,F,F,F],[F,F,T,F,F],[F,F,F,T,F]],
+    # ) (41)
+    [[F,T,F,F,F],[F,F,T,F,F],[F,F,F,T,F],[F,F,F,T,F],[F,F,F,T,F],[F,F,T,F,F],[F,T,F,F,F]],
+    # * (42)
+    [[F,F,F,F,F],[F,T,F,T,F],[F,F,T,F,F],[T,T,T,T,T],[F,F,T,F,F],[F,T,F,T,F],[F,F,F,F,F]],
+    # + (43)
+    [[F,F,F,F,F],[F,F,T,F,F],[F,F,T,F,F],[T,T,T,T,T],[F,F,T,F,F],[F,F,T,F,F],[F,F,F,F,F]],
+    # , (44)
+    [[F,F,F,F,F],[F,F,F,F,F],[F,F,F,F,F],[F,F,F,F,F],[F,F,T,T,F],[F,F,T,T,F],[F,T,T,F,F]],
+    # - (45)
+    [[F,F,F,F,F],[F,F,F,F,F],[F,F,F,F,F],[T,T,T,T,T],[F,F,F,F,F],[F,F,F,F,F],[F,F,F,F,F]],
+    # . (46)
+    [[F,F,F,F,F],[F,F,F,F,F],[F,F,F,F,F],[F,F,F,F,F],[F,F,F,F,F],[F,T,T,F,F],[F,T,T,F,F]],
+    # / (47)
+    [[F,F,F,F,T],[F,F,F,F,T],[F,F,F,T,F],[F,F,T,F,F],[F,T,F,F,F],[T,F,F,F,F],[T,F,F,F,F]],
+    # 0 (48)
+    [[F,T,T,T,F],[T,F,F,F,T],[T,F,F,T,T],[T,F,T,F,T],[T,T,F,F,T],[T,F,F,F,T],[F,T,T,T,F]],
+    # 1 (49)
+    [[F,F,T,F,F],[F,T,T,F,F],[F,F,T,F,F],[F,F,T,F,F],[F,F,T,F,F],[F,F,T,F,F],[F,T,T,T,F]],
+    # 2 (50)
+    [[F,T,T,T,F],[T,F,F,F,T],[F,F,F,F,T],[F,F,F,T,F],[F,F,T,F,F],[F,T,F,F,F],[T,T,T,T,T]],
+    # 3 (51)
+    [[F,T,T,T,F],[T,F,F,F,T],[F,F,F,F,T],[F,F,T,T,F],[F,F,F,F,T],[T,F,F,F,T],[F,T,T,T,F]],
+    # 4 (52)
+    [[F,F,F,T,F],[F,F,T,T,F],[F,T,F,T,F],[T,F,F,T,F],[T,T,T,T,T],[F,F,F,T,F],[F,F,F,T,F]],
+    # 5 (53)
+    [[T,T,T,T,T],[T,F,F,F,F],[T,T,T,T,F],[F,F,F,F,T],[F,F,F,F,T],[T,F,F,F,T],[F,T,T,T,F]],
+    # 6 (54)
+    [[F,F,T,T,F],[F,T,F,F,F],[T,F,F,F,F],[T,T,T,T,F],[T,F,F,F,T],[T,F,F,F,T],[F,T,T,T,F]],
+    # 7 (55)
+    [[T,T,T,T,T],[F,F,F,F,T],[F,F,F,T,F],[F,F,T,F,F],[F,T,F,F,F],[F,T,F,F,F],[F,T,F,F,F]],
+    # 8 (56)
+    [[F,T,T,T,F],[T,F,F,F,T],[T,F,F,F,T],[F,T,T,T,F],[T,F,F,F,T],[T,F,F,F,T],[F,T,T,T,F]],
+    # 9 (57)
+    [[F,T,T,T,F],[T,F,F,F,T],[T,F,F,F,T],[F,T,T,T,T],[F,F,F,F,T],[F,F,F,T,F],[F,T,T,F,F]],
+    # : (58)
+    [[F,F,F,F,F],[F,T,T,F,F],[F,T,T,F,F],[F,F,F,F,F],[F,T,T,F,F],[F,T,T,F,F],[F,F,F,F,F]],
+    # ; (59)
+    [[F,F,F,F,F],[F,T,T,F,F],[F,T,T,F,F],[F,F,F,F,F],[F,F,T,T,F],[F,F,T,T,F],[F,T,T,F,F]],
+    # < (60)
+    [[F,F,F,T,F],[F,F,T,F,F],[F,T,F,F,F],[T,F,F,F,F],[F,T,F,F,F],[F,F,T,F,F],[F,F,F,T,F]],
+    # = (61)
+    [[F,F,F,F,F],[F,F,F,F,F],[T,T,T,T,T],[F,F,F,F,F],[T,T,T,T,T],[F,F,F,F,F],[F,F,F,F,F]],
+    # > (62)
+    [[F,T,F,F,F],[F,F,T,F,F],[F,F,F,T,F],[F,F,F,F,T],[F,F,F,T,F],[F,F,T,F,F],[F,T,F,F,F]],
+    # ? (63)
+    [[F,T,T,T,F],[T,F,F,F,T],[F,F,F,F,T],[F,F,F,T,F],[F,F,T,F,F],[F,F,F,F,F],[F,F,T,F,F]],
+    # @ (64)
+    [[F,T,T,T,F],[T,F,F,F,T],[F,F,F,F,T],[F,T,T,F,T],[T,F,T,F,T],[T,F,T,T,T],[F,T,T,F,F]],
+    # A (65)
+    [[F,T,T,T,F],[T,F,F,F,T],[T,F,F,F,T],[T,T,T,T,T],[T,F,F,F,T],[T,F,F,F,T],[T,F,F,F,T]],
+    # B (66)
+    [[T,T,T,T,F],[T,F,F,F,T],[T,F,F,F,T],[T,T,T,T,F],[T,F,F,F,T],[T,F,F,F,T],[T,T,T,T,F]],
+    # C (67)
+    [[F,T,T,T,F],[T,F,F,F,T],[T,F,F,F,F],[T,F,F,F,F],[T,F,F,F,F],[T,F,F,F,T],[F,T,T,T,F]],
+    # D (68)
+    [[T,T,T,T,F],[T,F,F,F,T],[T,F,F,F,T],[T,F,F,F,T],[T,F,F,F,T],[T,F,F,F,T],[T,T,T,T,F]],
+    # E (69)
+    [[T,T,T,T,T],[T,F,F,F,F],[T,F,F,F,F],[T,T,T,T,F],[T,F,F,F,F],[T,F,F,F,F],[T,T,T,T,T]],
+    # F (70)
+    [[T,T,T,T,T],[T,F,F,F,F],[T,F,F,F,F],[T,T,T,T,F],[T,F,F,F,F],[T,F,F,F,F],[T,F,F,F,F]],
+    # G (71)
+    [[F,T,T,T,F],[T,F,F,F,T],[T,F,F,F,F],[T,F,T,T,T],[T,F,F,F,T],[T,F,F,F,T],[F,T,T,T,T]],
+    # H (72)
+    [[T,F,F,F,T],[T,F,F,F,T],[T,F,F,F,T],[T,T,T,T,T],[T,F,F,F,T],[T,F,F,F,T],[T,F,F,F,T]],
+    # I (73)
+    [[T,T,T,T,T],[F,F,T,F,F],[F,F,T,F,F],[F,F,T,F,F],[F,F,T,F,F],[F,F,T,F,F],[T,T,T,T,T]],
+    # J (74)
+    [[F,F,F,F,F],[F,F,F,F,F],[F,F,F,T,F],[F,F,F,F,F],[F,F,F,T,F],[F,T,F,T,F],[F,T,T,T,F]],
+    # K (75)
+    [[T,F,F,F,T],[T,F,F,T,F],[T,F,T,F,F],[T,T,F,F,F],[T,F,T,F,F],[T,F,F,T,F],[T,F,F,F,T]],
+    # L (76)
+    [[T,F,F,F,F],[T,F,F,F,F],[T,F,F,F,F],[T,F,F,F,F],[T,F,F,F,F],[T,F,F,F,F],[T,T,T,T,T]],
+    # M (77)
+    [[T,F,F,F,T],[T,T,F,T,T],[T,F,T,F,T],[T,F,T,F,T],[T,F,F,F,T],[T,F,F,F,T],[T,F,F,F,T]],
+    # N (78)
+    [[T,F,F,F,T],[T,F,F,F,T],[T,T,F,F,T],[T,F,T,F,T],[T,F,F,T,T],[T,F,F,F,T],[T,F,F,F,T]],
+    # O (79)
+    [[F,T,T,T,F],[T,F,F,F,T],[T,F,F,F,T],[T,F,F,F,T],[T,F,F,F,T],[T,F,F,F,T],[F,T,T,T,F]],
+    # P (80)
+    [[T,T,T,T,F],[T,F,F,F,T],[T,F,F,F,T],[T,T,T,T,F],[T,F,F,F,F],[T,F,F,F,F],[T,F,F,F,F]],
+    # Q (81)
+    [[F,T,T,T,F],[T,F,F,F,T],[T,F,F,F,T],[T,F,F,F,T],[T,F,T,F,T],[T,F,F,T,F],[F,T,T,F,T]],
+    # R (82)
+    [[T,T,T,T,F],[T,F,F,F,T],[T,F,F,F,T],[T,T,T,T,F],[T,F,T,F,F],[T,F,F,T,F],[T,F,F,F,T]],
+    # S (83)
+    [[F,T,T,T,F],[T,F,F,F,T],[T,F,F,F,F],[F,T,T,T,F],[F,F,F,F,T],[T,F,F,F,T],[F,T,T,T,F]],
+    # T (84)
+    [[T,T,T,T,T],[F,F,T,F,F],[F,F,T,F,F],[F,F,T,F,F],[F,F,T,F,F],[F,F,T,F,F],[F,F,T,F,F]],
+    # U (85)
+    [[T,F,F,F,T],[T,F,F,F,T],[T,F,F,F,T],[T,F,F,F,T],[T,F,F,F,T],[T,F,F,F,T],[F,T,T,T,F]],
+    # V (86)
+    [[T,F,F,F,T],[T,F,F,F,T],[T,F,F,F,T],[T,F,F,F,T],[T,F,F,F,T],[F,T,F,T,F],[F,F,T,F,F]],
+    # W (87)
+    [[T,F,F,F,T],[T,F,F,F,T],[T,F,F,F,T],[T,F,T,F,T],[T,F,T,F,T],[T,T,F,T,T],[T,F,F,F,T]],
+    # X (88)
+    [[T,F,F,F,T],[T,F,F,F,T],[F,T,F,T,F],[F,F,T,F,F],[F,T,F,T,F],[T,F,F,F,T],[T,F,F,F,T]],
+    # Y (89)
+    [[T,F,F,F,T],[T,F,F,F,T],[F,T,F,T,F],[F,F,T,F,F],[F,F,T,F,F],[F,F,T,F,F],[F,F,T,F,F]],
+    # Z (90)
+    [[T,T,T,T,T],[F,F,F,F,T],[F,F,F,T,F],[F,F,T,F,F],[F,T,F,F,F],[T,F,F,F,F],[T,T,T,T,T]],
+    # [ (91)
+    [[F,T,T,T,F],[F,T,F,F,F],[F,T,F,F,F],[F,T,F,F,F],[F,T,F,F,F],[F,T,F,F,F],[F,T,T,T,F]],
+    # \ (92)
+    [[T,F,F,F,F],[T,F,F,F,F],[F,T,F,F,F],[F,F,T,F,F],[F,F,F,T,F],[F,F,F,F,T],[F,F,F,F,T]],
+    # ] (93)
+    [[F,T,T,T,F],[F,F,F,T,F],[F,F,F,T,F],[F,F,F,T,F],[F,F,F,T,F],[F,F,F,T,F],[F,T,T,T,F]],
+    # ^ (94)
+    [[F,F,T,F,F],[F,T,F,T,F],[T,F,F,F,T],[F,F,F,F,F],[F,F,F,F,F],[F,F,F,F,F],[F,F,F,F,F]],
+    # _ (95)
+    [[F,F,F,F,F],[F,F,F,F,F],[F,F,F,F,F],[F,F,F,F,F],[F,F,F,F,F],[F,F,F,F,F],[T,T,T,T,T]],
+    # ` (96)
+    [[F,T,T,F,F],[F,F,T,F,F],[F,F,F,T,F],[F,F,F,F,F],[F,F,F,F,F],[F,F,F,F,F],[F,F,F,F,F]],
+    # a (97)
+    [[F,F,F,F,F],[F,F,F,F,F],[F,T,T,T,F],[F,F,F,F,T],[F,T,T,T,T],[T,F,F,F,T],[F,T,T,T,T]],
+    # b (98)
+    [[T,F,F,F,F],[T,F,F,F,F],[T,F,T,T,F],[T,T,F,F,T],[T,F,F,F,T],[T,F,F,F,T],[T,T,T,T,F]],
+    # c (99)
+    [[F,F,F,F,F],[F,F,F,F,F],[F,T,T,T,F],[T,F,F,F,T],[T,F,F,F,F],[T,F,F,F,T],[F,T,T,T,F]],
+    # d (100)
+    [[F,F,F,F,T],[F,F,F,F,T],[F,T,T,F,T],[T,F,F,T,T],[T,F,F,F,T],[T,F,F,F,T],[F,T,T,T,T]],
+    # e (101)
+    [[F,F,F,F,F],[F,F,F,F,F],[F,T,T,T,F],[T,F,F,F,T],[T,T,T,T,T],[T,F,F,F,F],[F,T,T,T,F]],
+    # f (102)
+    [[F,F,T,T,F],[F,T,F,F,T],[F,T,F,F,F],[T,T,T,F,F],[F,T,F,F,F],[F,T,F,F,F],[F,T,F,F,F]],
+    # g (103)
+    [[F,F,F,F,F],[F,T,T,T,F],[T,F,F,F,T],[T,F,F,F,T],[F,T,T,T,T],[F,F,F,F,T],[F,T,T,T,F]],
+    # h (104)
+    [[T,F,F,F,F],[T,F,F,F,F],[T,F,T,T,F],[T,T,F,F,T],[T,F,F,F,T],[T,F,F,F,T],[T,F,F,F,T]],
+    # i (105)
+    [[F,F,T,F,F],[F,F,F,F,F],[F,T,T,F,F],[F,F,T,F,F],[F,F,T,F,F],[F,F,T,F,F],[F,T,T,T,F]],
+    # j (106)
+    [[F,F,F,T,F],[F,F,F,F,F],[F,F,T,T,F],[F,F,F,T,F],[F,F,F,T,F],[T,F,F,T,F],[F,T,T,F,F]],
+    # k (107)
+    [[T,F,F,F,F],[T,F,F,F,F],[T,F,F,T,F],[T,F,T,F,F],[T,T,F,F,F],[T,F,T,F,F],[T,F,F,T,F]],
+    # l (108)
+    [[F,T,T,F,F],[F,F,T,F,F],[F,F,T,F,F],[F,F,T,F,F],[F,F,T,F,F],[F,F,T,F,F],[F,T,T,T,F]],
+    # m (109)
+    [[F,F,F,F,F],[F,F,F,F,F],[T,T,F,T,F],[T,F,T,F,T],[T,F,T,F,T],[T,F,T,F,T],[T,F,T,F,T]],
+    # n (110)
+    [[F,F,F,F,F],[F,F,F,F,F],[T,F,T,T,F],[T,T,F,F,T],[T,F,F,F,T],[T,F,F,F,T],[T,F,F,F,T]],
+    # o (111)
+    [[F,F,F,F,F],[F,F,F,F,F],[F,T,T,T,F],[T,F,F,F,T],[T,F,F,F,T],[T,F,F,F,T],[F,T,T,T,F]],
+    # p (112)
+    [[F,F,F,F,F],[F,F,F,F,F],[T,T,T,T,F],[T,F,F,F,T],[T,F,F,F,T],[T,T,T,T,F],[T,F,F,F,F]],
+    # q (113)
+    [[F,F,F,F,F],[F,T,T,T,T],[T,F,F,F,T],[T,F,F,F,T],[F,T,T,T,T],[F,F,F,F,T],[F,F,F,F,T]],
+    # r (114)
+    [[F,F,F,F,F],[F,F,F,F,F],[T,F,T,T,F],[T,T,F,F,T],[T,F,F,F,F],[T,F,F,F,F],[T,F,F,F,F]],
+    # s (115)
+    [[F,F,F,F,F],[F,F,F,F,F],[F,T,T,T,F],[T,F,F,F,F],[F,T,T,T,F],[F,F,F,F,T],[T,T,T,T,F]],
+    # t (116)
+    [[F,T,F,F,F],[F,T,F,F,F],[T,T,T,T,F],[F,T,F,F,F],[F,T,F,F,F],[F,T,F,F,T],[F,F,T,T,F]],
+    # u (117)
+    [[F,F,F,F,F],[F,F,F,F,F],[T,F,F,F,T],[T,F,F,F,T],[T,F,F,F,T],[T,F,F,T,T],[F,T,T,F,T]],
+    # v (118)
+    [[F,F,F,F,F],[F,F,F,F,F],[T,F,F,F,T],[T,F,F,F,T],[T,F,F,F,T],[F,T,F,T,F],[F,F,T,F,F]],
+    # w (119)
+    [[F,F,F,F,F],[F,F,F,F,F],[T,F,F,F,T],[T,F,F,F,T],[T,F,T,F,T],[T,F,T,F,T],[F,T,F,T,F]],
+    # x (120)
+    [[F,F,F,F,F],[F,F,F,F,F],[T,F,F,F,T],[F,T,F,T,F],[F,F,T,F,F],[F,T,F,T,F],[T,F,F,F,T]],
+    # y (121)
+    [[F,F,F,F,F],[F,F,F,F,F],[T,F,F,F,T],[T,F,F,F,T],[F,T,T,T,F],[F,F,F,F,T],[F,T,T,T,F]],
+    # z (122)
+    [[F,F,F,F,F],[F,F,F,F,F],[T,T,T,T,T],[F,F,F,T,F],[F,F,T,F,F],[F,T,F,F,F],[T,T,T,T,T]],
+    # { (123)
+    [[F,F,F,T,F],[F,F,T,F,F],[F,F,T,F,F],[F,T,F,F,F],[F,F,T,F,F],[F,F,T,F,F],[F,F,F,T,F]],
+    # | (124)
+    [[F,F,T,F,F],[F,F,T,F,F],[F,F,T,F,F],[F,F,T,F,F],[F,F,T,F,F],[F,F,T,F,F],[F,F,T,F,F]],
+    # } (125)
+    [[F,T,F,F,F],[F,F,T,F,F],[F,F,T,F,F],[F,F,F,T,F],[F,F,T,F,F],[F,F,T,F,F],[F,T,F,F,F]],
+    # ~ (126)
+    [[F,F,F,F,F],[F,T,F,F,F],[T,F,T,F,T],[F,F,F,T,F],[F,F,F,F,F],[F,F,F,F,F],[F,F,F,F,F]],
+]
diff --git a/rpi/low_level.py b/rpi/low_level.py
new file mode 100644
index 0000000..1c371be
--- /dev/null
+++ b/rpi/low_level.py
@@ -0,0 +1,78 @@
+from rpi_ws281x import Color
+from config import PANEL_PIXEL_COUNT, DISPLAY_MAX_X, DISPLAY_MAX_Y
+from fonts import FONT_7X5
+
+# Set by main.py after strip is created
+strip = None
+
+
+def _pixel_index(x, y):
+    if x % 2 == 1:
+        y = PANEL_PIXEL_COUNT - 1 - y
+    return y + (x * PANEL_PIXEL_COUNT)
+
+
+def set_pixel(x, y, r, g, b):
+    if x < 0 or y < 0 or x > DISPLAY_MAX_X or y > DISPLAY_MAX_Y:
+        return
+    strip.setPixelColor(_pixel_index(x, y), Color(r, g, b))
+
+
+def get_pixel_color(x, y):
+    """Returns (r, g, b) tuple."""
+    if x < 0 or y < 0 or x > DISPLAY_MAX_X or y > DISPLAY_MAX_Y:
+        return (0, 0, 0)
+    c = strip.getPixelColor(_pixel_index(x, y))
+    return ((c >> 16) & 0xFF, (c >> 8) & 0xFF, c & 0xFF)
+
+
+def fill_pixels(x1, y1, x2, y2, r, g, b):
+    if x1 > x2:
+        x1, x2 = x2, x1
+    if y1 > y2:
+        y1, y2 = y2, y1
+    for y in range(y1, y2 + 1):
+        for x in range(x1, x2 + 1):
+            set_pixel(x, y, r, g, b)
+
+
+def shift_rectangle_left(x1, y1, x2, y2, shift_by):
+    if not shift_by:
+        return
+    if x1 > x2:
+        x1, x2 = x2, x1
+    if y1 > y2:
+        y1, y2 = y2, y1
+    for y in range(y1, y2 + 1):
+        if y < 0 or y > DISPLAY_MAX_Y:
+            continue
+        for x in range(x1, x2 + 1):
+            src_x = x1 + (x - x1)
+            dest_x = src_x - shift_by
+            color = (0, 0, 0)
+            if 0 <= src_x <= DISPLAY_MAX_X:
+                color = get_pixel_color(src_x, y)
+            if 0 <= dest_x <= DISPLAY_MAX_X:
+                set_pixel(dest_x, y, *color)
+    for y in range(y1, y2 + 1):
+        if y < 0 or y > DISPLAY_MAX_Y:
+            continue
+        for x in range(x2 - shift_by + 1, x2 + 1):
+            if 0 <= x <= DISPLAY_MAX_X:
+                set_pixel(x, y, 0, 0, 0)
+
+
+def draw_character_part(row_data, width, r, g, b, start_x, start_y):
+    for col in range(width):
+        if row_data[col]:
+            px = col + start_x
+            py = start_y
+            if 0 <= px <= DISPLAY_MAX_X and 0 <= py <= DISPLAY_MAX_Y:
+                set_pixel(px, py, r, g, b)
+
+
+def draw_character(char_data, height, width, r, g, b, cursor):
+    """Draws one character at cursor position, advances cursor.x by width+1."""
+    for row in range(height):
+        draw_character_part(char_data[row], width, r, g, b, cursor['x'], row + cursor['y'])
+    cursor['x'] += width + 1
diff --git a/rpi/main.py b/rpi/main.py
new file mode 100644
index 0000000..5613e4a
--- /dev/null
+++ b/rpi/main.py
@@ -0,0 +1,431 @@
+#!/usr/bin/env python3
+"""
+PTI LEDY - Raspberry Pi 4 port
+Requires: sudo pip3 install rpi_ws281x flask
+Run with: sudo python3 main.py
+"""
+
+import time
+import random
+import sys
+
+from rpi_ws281x import PixelStrip, ws
+
+import config
+import low_level
+import server
+from fonts import FONT_7X5
+
+# ---------------------------------------------------------------------------
+# Strip init
+# ---------------------------------------------------------------------------
+strip = PixelStrip(
+    config.NUMPIXELS,
+    config.PIN,
+    freq_hz=800000,
+    dma=10,
+    invert=False,
+    brightness=255,
+    channel=0,
+    strip_type=ws.WS2811_STRIP_GRB,
+)
+strip.begin()
+low_level.strip = strip
+
+# ---------------------------------------------------------------------------
+# Global state
+# ---------------------------------------------------------------------------
+global_node_id = 0
+
+text_nodes = [None] * config.MAX_TEXT_NODES_COUNT
+multi_color_text_nodes = [None] * config.MAX_TEXT_NODES_COUNT
+
+for i in range(config.MAX_TEXT_NODES_COUNT):
+    text_nodes[i] = {
+        'global_id': 0, 'content': '', 'color': (0, 0, 0),
+        'char_height': config.MEDIUM_TEXT_HEIGHT, 'char_width': config.MEDIUM_TEXT_WIDTH,
+        'pos_x': 0, 'pos_y': 0, 'character_count': 0,
+        'scroll_slowness': 0, 'scroll_progress': 0,
+        'disappear_time': 0, 'is_scrolling': True, 'is_repeating': False,
+    }
+    multi_color_text_nodes[i] = {
+        'global_id': 0, 'content': '', 'colors': [],  # list of (r,g,b,start_index)
+        'char_height': config.MEDIUM_TEXT_HEIGHT, 'char_width': config.MEDIUM_TEXT_WIDTH,
+        'pos_x': 0, 'pos_y': 0, 'character_count': 0, 'color_count': 0,
+        'scroll_slowness': 0, 'scroll_progress': 0,
+        'disappear_time': 0, 'is_scrolling': True, 'is_repeating': False,
+    }
+
+main_animation_started = False
+bottom_text_state = 0
+scroll_node_global_id = 0
+scroll_node_active = False
+
+program2_active = False
+bottom_text_iteration_count = 0
+program2_vehicles_spawned = 0
+program2_drain_counter = 0
+program2_done = False
+program2_scroll_progress = 0
+program2_spacing_counter = 0
+
+VEHICLES = [
+    [[0,0,0,0,0,0,0,0],[0,0,1,1,1,1,1,0],[1,1,1,1,1,1,1,1],[0,1,0,0,0,0,1,0]],
+    [[0,0,1,1,0,0,0,0],[0,1,1,1,0,0,0,0],[1,1,1,1,1,1,1,1],[0,1,0,0,0,0,1,0]],
+    [[0,0,1,1,0,1,1,1],[0,1,1,1,1,1,1,1],[1,1,1,1,1,1,1,1],[0,1,0,0,0,0,1,0]],
+    [[0,0,0,0,1,1,0,0],[0,0,1,1,1,1,1,0],[0,1,1,1,1,1,1,1],[0,0,1,0,0,0,1,0]],
+    [[0,0,0,0,0,0,0,0],[0,0,0,1,1,1,1,1],[0,0,1,1,1,1,1,1],[0,0,0,1,0,0,1,0]],
+    [[1,1,1,1,1,1,1,1],[0,1,0,1,0,1,0,1],[0,1,1,1,1,1,1,1],[0,0,1,0,0,0,1,0]],
+    [[0,0,0,0,0,0,0,0],[0,0,1,1,0,0,0,0],[1,1,1,1,1,1,1,1],[0,1,0,0,0,0,1,0]],
+    [[1,1,0,1,1,1,1,1],[1,1,0,1,1,1,1,1],[1,1,1,1,1,1,1,1],[0,1,0,0,0,0,1,0]],
+    [[0,0,0,1,1,1,1,1],[0,0,1,1,1,1,1,1],[1,1,1,1,1,1,1,1],[0,1,0,0,0,0,1,0]],
+    [[0,0,0,0,0,0,0,0],[0,1,1,1,0,0,0,1],[1,1,1,1,1,1,1,0],[0,1,0,0,0,1,0,0]],
+    [[0,1,0,1,1,1,1,1],[1,1,0,1,1,1,1,1],[1,1,1,1,1,1,1,1],[0,0,1,0,0,0,1,0]],
+    [[0,0,0,0,0,0,0,0],[0,0,0,0,0,1,1,0],[0,0,0,1,1,1,1,1],[0,0,0,0,1,0,1,0]],
+]
+
+# ---------------------------------------------------------------------------
+# Helpers
+# ---------------------------------------------------------------------------
+
+def _get_text_node_x2(node):
+    if node['character_count'] == 0:
+        return node['pos_x']
+    return node['pos_x'] + (node['char_width'] * node['character_count']) + (node['character_count'] - 1) - 1
+
+def _get_text_node_y2(node):
+    return node['pos_y'] + node['char_height'] - 1
+
+def _color_for_char(r, g, b):
+    return (r, g, b)
+
+def _add_text_node(content, color, pos_x, pos_y, scroll_slowness, is_scrolling, is_small, disappear_time, is_repeating):
+    global global_node_id
+    if not content:
+        return None
+    h = config.SMALL_TEXT_HEIGHT if is_small else config.MEDIUM_TEXT_HEIGHT
+    w = config.SMALL_TEXT_WIDTH if is_small else config.MEDIUM_TEXT_WIDTH
+    for node in text_nodes:
+        if node['disappear_time'] == 0:
+            node['content'] = content
+            node['color'] = color
+            node['pos_x'] = pos_x
+            node['pos_y'] = pos_y
+            node['char_height'] = h
+            node['char_width'] = w
+            node['character_count'] = len(content)
+            node['scroll_slowness'] = scroll_slowness
+            node['scroll_progress'] = 0
+            node['is_scrolling'] = is_scrolling
+            node['is_repeating'] = is_repeating
+            node['disappear_time'] = disappear_time
+            node['global_id'] = global_node_id
+            global_node_id += 1
+            return node
+    return None
+
+def _add_multi_color_node(content, colors, pos_x, pos_y, scroll_slowness, is_scrolling, is_small, disappear_time, is_repeating):
+    global global_node_id
+    if not content:
+        return None
+    h = config.SMALL_TEXT_HEIGHT if is_small else config.MEDIUM_TEXT_HEIGHT
+    w = config.SMALL_TEXT_WIDTH if is_small else config.MEDIUM_TEXT_WIDTH
+    for node in multi_color_text_nodes:
+        if node['disappear_time'] == 0:
+            node['content'] = content
+            node['colors'] = list(colors)
+            node['color_count'] = len(colors)
+            node['pos_x'] = pos_x
+            node['pos_y'] = pos_y
+            node['char_height'] = h
+            node['char_width'] = w
+            node['character_count'] = len(content)
+            node['scroll_slowness'] = scroll_slowness
+            node['scroll_progress'] = 0
+            node['is_scrolling'] = is_scrolling
+            node['is_repeating'] = is_repeating
+            node['disappear_time'] = disappear_time
+            node['global_id'] = global_node_id
+            global_node_id += 1
+            return node
+    return None
+
+def _is_node_existing(gid):
+    for node in text_nodes:
+        if node['global_id'] == gid and node['disappear_time'] != 0:
+            return True
+    for node in multi_color_text_nodes:
+        if node['global_id'] == gid and node['disappear_time'] != 0:
+            return True
+    return False
+
+def _reset_global_id():
+    global global_node_id
+    global_node_id = 2
+
+# ---------------------------------------------------------------------------
+# Drawing
+# ---------------------------------------------------------------------------
+
+def _draw_char(ch, height, width, r, g, b, cursor):
+    if ord(ch) < ord('!') or ord(ch) > ord('~'):
+        ch = ' '
+    glyph = FONT_7X5[ord(ch) - ord(' ')]
+    low_level.draw_character(glyph, height, width, r, g, b, cursor)
+
+def scroll_all_texts(split_scroll_mode=False):
+    for node in text_nodes:
+        if node['disappear_time'] == 0:
+            continue
+        if node['is_scrolling']:
+            if node['scroll_slowness'] > node['scroll_progress']:
+                node['scroll_progress'] += 1
+            else:
+                node['scroll_progress'] = 0
+                x2 = _get_text_node_x2(node)
+                if split_scroll_mode or node['pos_y'] >= 7:
+                    if x2 < 0:
+                        if node['is_repeating']:
+                            node['pos_x'] = config.DISPLAY_MAX_X
+                        else:
+                            node['disappear_time'] = 1
+                        continue
+                    node['pos_x'] -= 1
+                else:
+                    if node['pos_x'] > config.DISPLAY_MAX_X:
+                        if node['is_repeating']:
+                            node['pos_x'] = -x2 + node['pos_x']
+                        else:
+                            node['disappear_time'] = 1
+                        continue
+                    node['pos_x'] += 1
+
+        cursor = {'x': node['pos_x'], 'y': node['pos_y']}
+        r, g, b = node['color']
+        for ch in node['content']:
+            _draw_char(ch, node['char_height'], node['char_width'], r, g, b, cursor)
+
+def scroll_all_multi_color_texts(split_scroll_mode=False):
+    for node in multi_color_text_nodes:
+        if node['disappear_time'] == 0:
+            continue
+        if node['is_scrolling']:
+            if node['scroll_slowness'] > node['scroll_progress']:
+                node['scroll_progress'] += 1
+            else:
+                node['scroll_progress'] = 0
+                x1 = node['pos_x']
+                x2 = x1 + (node['char_width'] * node['character_count']) + (node['character_count'] - 1) - 1
+                if split_scroll_mode or node['pos_y'] >= 7:
+                    if x2 < 0:
+                        if node['is_repeating']:
+                            node['pos_x'] = config.DISPLAY_MAX_X
+                        else:
+                            node['disappear_time'] = 1
+                        continue
+                    node['pos_x'] -= 1
+                else:
+                    if x1 > config.DISPLAY_MAX_X:
+                        if node['is_repeating']:
+                            node['pos_x'] = -x2 + x1
+                        else:
+                            node['disappear_time'] = 1
+                        continue
+                    node['pos_x'] += 1
+
+        cursor = {'x': node['pos_x'], 'y': node['pos_y']}
+        color_index = 0
+        r, g, b, _ = node['colors'][0]
+        for j, ch in enumerate(node['content']):
+            if color_index < node['color_count'] - 1 and node['colors'][color_index + 1][3] == j:
+                color_index += 1
+                r, g, b, _ = node['colors'][color_index]
+            _draw_char(ch, node['char_height'], node['char_width'], r, g, b, cursor)
+
+def handle_disappear_timers():
+    for node in text_nodes:
+        if node['disappear_time'] > 0:
+            node['disappear_time'] -= 1
+            if node['disappear_time'] == 0:
+                low_level.fill_pixels(
+                    node['pos_x'], node['pos_y'],
+                    _get_text_node_x2(node), _get_text_node_y2(node),
+                    0, 0, 0
+                )
+
+def handle_multi_color_disappear_timers():
+    for node in multi_color_text_nodes:
+        if node['disappear_time'] > 0:
+            node['disappear_time'] -= 1
+            if node['disappear_time'] == 0:
+                x2 = node['pos_x'] + (node['char_width'] * node['character_count']) + (node['character_count'] - 1) - 1
+                low_level.fill_pixels(
+                    node['pos_x'], node['pos_y'],
+                    x2, node['pos_y'] + node['char_height'] - 1,
+                    0, 0, 0
+                )
+
+# ---------------------------------------------------------------------------
+# Programs
+# ---------------------------------------------------------------------------
+
+def handle_program1():
+    global main_animation_started, scroll_node_active, scroll_node_global_id
+    global bottom_text_state, bottom_text_iteration_count, program2_active
+
+    s = server.state
+
+    if not s['program_top_text_enabled']:
+        for node in multi_color_text_nodes:
+            if node['disappear_time'] != 0:
+                node['disappear_time'] = 1
+        main_animation_started = False
+    elif not main_animation_started:
+        if not _is_node_existing(0) and not _is_node_existing(1):
+            main_animation_started = True
+            _add_multi_color_node(
+                "Witamy w PTI",
+                [(40, 40, 40, 0), (0, 0, 50, 9)],
+                0, 0, 3, True, True, -1, True
+            )
+
+    if not s['program_bottom_text_enabled']:
+        if scroll_node_active:
+            for node in text_nodes:
+                if node['disappear_time'] != 0:
+                    node['disappear_time'] = 1
+            scroll_node_active = False
+        if program2_active:
+            program2_active = False
+        return
+
+    if program2_active:
+        return
+
+    if (main_animation_started or not s['program_top_text_enabled']) and \
+       (not scroll_node_active or not _is_node_existing(scroll_node_global_id)):
+
+        if scroll_node_active:
+            bottom_text_iteration_count += 1
+            scroll_node_active = False
+            if s['program_vehicles_enabled'] and bottom_text_iteration_count >= config.PROGRAM2_TEXT_ITERATIONS:
+                bottom_text_iteration_count = 0
+                if random.randint(0, 99) < config.PROGRAM2_TRIGGER_CHANCE:
+                    program2_active = True
+                    reset_program2()
+                    low_level.fill_pixels(0, 9, config.DISPLAY_MAX_X, config.DISPLAY_MAX_Y, 0, 0, 0)
+                    return
+
+        texts = [
+            ("Technik informatyk + ai, robotyka", (0, 0, 50)),
+            ("Technik programista",               (50, 40, 0)),
+            ("Technik poligrafii i grafiki komputerowej", (0, 45, 0)),
+            ("Technik reklamy",                   (60, 20, 0)),
+        ]
+        text, color = texts[bottom_text_state]
+        node = _add_text_node(text, color, config.DISPLAY_MAX_X, 9, 1, True, True, -1, False)
+        if node is not None:
+            scroll_node_global_id = node['global_id']
+            scroll_node_active = True
+            bottom_text_state = (bottom_text_state + 1) % 4
+
+
+def draw_vehicle(index, pos_x, pos_y):
+    vr, vg, vb = config.VEHICLE_COLOR
+    for row in range(4):
+        for col in range(8):
+            if VEHICLES[index][row][col]:
+                low_level.set_pixel(pos_x + col, pos_y + row, vr, vg, vb)
+
+
+def reset_program2():
+    global program2_scroll_progress, program2_spacing_counter
+    global program2_vehicles_spawned, program2_drain_counter, program2_done
+    program2_scroll_progress = 0
+    program2_spacing_counter = 0
+    program2_vehicles_spawned = 0
+    program2_drain_counter = 0
+    program2_done = False
+
+
+def handle_program2(spacing=4, scroll_slowness=1, y=0, max_vehicles=0):
+    global program2_scroll_progress, program2_spacing_counter
+    global program2_vehicles_spawned, program2_drain_counter, program2_done
+
+    if scroll_slowness > program2_scroll_progress:
+        program2_scroll_progress += 1
+        return
+    program2_scroll_progress = 0
+
+    low_level.shift_rectangle_left(0, y, config.DISPLAY_MAX_X, y + 3, 1)
+
+    if max_vehicles > 0 and program2_vehicles_spawned >= max_vehicles:
+        program2_drain_counter += 1
+        if program2_drain_counter >= config.DISPLAY_MAX_X + 1:
+            program2_done = True
+        return
+
+    program2_spacing_counter -= 1
+    if program2_spacing_counter <= 0:
+        draw_vehicle(random.randint(0, 11), config.DISPLAY_MAX_X - 7, y)
+        program2_spacing_counter = 8 + spacing
+        if max_vehicles > 0:
+            program2_vehicles_spawned += 1
+
+# ---------------------------------------------------------------------------
+# Main loop
+# ---------------------------------------------------------------------------
+
+def setup():
+    strip.setBrightness(255)
+    for i in range(config.NUMPIXELS):
+        strip.setPixelColor(i, 0)
+    strip.show()
+    server.start_server(port=80)
+    print("Server started. Running display loop.")
+
+
+def loop():
+    global program2_active
+
+    s = server.state
+
+    low_level.fill_pixels(0, 0, config.DISPLAY_MAX_X, 7, 0, 0, 0)
+    handle_program1()
+
+    if s['program_top_text_enabled']:
+        scroll_all_multi_color_texts(split_scroll_mode=True)
+        handle_multi_color_disappear_timers()
+
+    if not s['program_bottom_text_enabled']:
+        if program2_active:
+            program2_active = False
+        low_level.fill_pixels(0, 9, config.DISPLAY_MAX_X, config.DISPLAY_MAX_Y, 0, 0, 0)
+    elif program2_active and not s['program_vehicles_enabled']:
+        program2_active = False
+        low_level.fill_pixels(0, 9, config.DISPLAY_MAX_X, config.DISPLAY_MAX_Y, 0, 0, 0)
+    elif program2_active:
+        handle_program2(spacing=4, scroll_slowness=1, y=12, max_vehicles=config.PROGRAM2_VEHICLE_COUNT)
+        if program2_done:
+            program2_active = False
+            low_level.fill_pixels(0, 9, config.DISPLAY_MAX_X, config.DISPLAY_MAX_Y, 0, 0, 0)
+    else:
+        low_level.fill_pixels(0, 9, config.DISPLAY_MAX_X, config.DISPLAY_MAX_Y, 0, 0, 0)
+        scroll_all_texts(split_scroll_mode=True)
+        handle_disappear_timers()
+
+    strip.show()
+
+
+if __name__ == '__main__':
+    setup()
+    try:
+        while True:
+            loop()
+            time.sleep(0.02)  # ~50 fps
+    except KeyboardInterrupt:
+        for i in range(config.NUMPIXELS):
+            strip.setPixelColor(i, 0)
+        strip.show()
+        print("\nStopped.")
+        sys.exit(0)
diff --git a/rpi/requirements.txt b/rpi/requirements.txt
new file mode 100644
index 0000000..e0e30f7
--- /dev/null
+++ b/rpi/requirements.txt
@@ -0,0 +1,2 @@
+rpi_ws281x
+flask
diff --git a/rpi/server.py b/rpi/server.py
new file mode 100644
index 0000000..f9c0998
--- /dev/null
+++ b/rpi/server.py
@@ -0,0 +1,151 @@
+from flask import Flask, request, jsonify, Response
+import threading
+
+app = Flask(__name__)
+
+# Shared state — written by Flask thread, read by main loop
+state = {
+    'brightness': 100,
+    'program_top_text_enabled': True,
+    'program_bottom_text_enabled': True,
+    'program_vehicles_enabled': True,
+}
+_lock = threading.Lock()
+
+INDEX_HTML = """<!DOCTYPE HTML><html>
+<head>
+  <title>LED Panel Control</title>
+  <meta name="viewport" content="width=device-width, initial-scale=1">
+  <style>
+    * { box-sizing: border-box; margin: 0; padding: 0; }
+    body { font-family: Arial, sans-serif; background: #1a1a2e; color: #eee; padding: 20px; }
+    h1 { text-align: center; margin-bottom: 30px; font-size: 1.5em; }
+    .container { max-width: 400px; margin: 0 auto; }
+    .card { background: #16213e; border-radius: 12px; padding: 16px 20px; margin-bottom: 12px;
+            display: flex; align-items: center; justify-content: space-between; }
+    .card-label { font-size: 1em; }
+    .card-label small { display: block; color: #888; font-size: 0.75em; margin-top: 2px; }
+    .toggle { position: relative; width: 52px; height: 28px; flex-shrink: 0; }
+    .toggle input { opacity: 0; width: 0; height: 0; }
+    .toggle .slider { position: absolute; cursor: pointer; top: 0; left: 0; right: 0; bottom: 0;
+                      background: #444; border-radius: 28px; transition: 0.3s; }
+    .toggle .slider:before { content: ""; position: absolute; height: 22px; width: 22px;
+                              left: 3px; bottom: 3px; background: #fff; border-radius: 50%; transition: 0.3s; }
+    .toggle input:checked + .slider { background: #4CAF50; }
+    .toggle input:checked + .slider:before { transform: translateX(24px); }
+    .brightness-card { background: #16213e; border-radius: 12px; padding: 16px 20px; margin-bottom: 12px; }
+    .brightness-card label { font-size: 1em; display: block; margin-bottom: 8px; }
+    .brightness-row { display: flex; align-items: center; gap: 12px; }
+    .brightness-row input[type=range] { flex: 1; accent-color: #4CAF50; }
+    .brightness-row span { min-width: 32px; text-align: right; }
+  </style>
+</head>
+<body>
+  <div class="container">
+    <h1>LED Panel Control</h1>
+    <div class="card">
+      <div class="card-label">Top Text<small>Witamy w PTI</small></div>
+      <label class="toggle"><input type="checkbox" id="top_text" checked onchange="toggle('top_text', this.checked)"><span class="slider"></span></label>
+    </div>
+    <div class="card">
+      <div class="card-label">Bottom Text<small>School programs</small></div>
+      <label class="toggle"><input type="checkbox" id="bottom_text" checked onchange="toggle('bottom_text', this.checked)"><span class="slider"></span></label>
+    </div>
+    <div class="card">
+      <div class="card-label">Vehicles<small>Vehicle interruptions</small></div>
+      <label class="toggle"><input type="checkbox" id="vehicles" checked onchange="toggle('vehicles', this.checked)"><span class="slider"></span></label>
+    </div>
+    <div class="brightness-card">
+      <label>Brightness</label>
+      <div class="brightness-row">
+        <input type="range" id="brightness" min="0" max="100" value="100" oninput="updateBrightnessLabel()" onchange="sendBrightness()">
+        <span id="brightnessValue">100</span>
+      </div>
+    </div>
+  </div>
+  <script>
+    function toggle(program, enabled) {
+      var xhr = new XMLHttpRequest();
+      xhr.open("POST", "/toggle-program", true);
+      xhr.setRequestHeader("Content-Type", "application/x-www-form-urlencoded");
+      xhr.send("program=" + program + "&enabled=" + (enabled ? "true" : "false"));
+    }
+    function updateBrightnessLabel() {
+      document.getElementById("brightnessValue").innerText = document.getElementById("brightness").value;
+    }
+    function sendBrightness() {
+      var val = document.getElementById("brightness").value;
+      var xhr = new XMLHttpRequest();
+      xhr.open("POST", "/brightness", true);
+      xhr.setRequestHeader("Content-Type", "application/x-www-form-urlencoded");
+      xhr.send("value=" + val);
+    }
+    function fetchStatus() {
+      var xhr = new XMLHttpRequest();
+      xhr.open("GET", "/program-status", true);
+      xhr.onload = function() {
+        if (xhr.status === 200) {
+          var s = JSON.parse(xhr.responseText);
+          document.getElementById("top_text").checked = s.top_text;
+          document.getElementById("bottom_text").checked = s.bottom_text;
+          document.getElementById("vehicles").checked = s.vehicles;
+          document.getElementById("brightness").value = s.brightness;
+          document.getElementById("brightnessValue").innerText = s.brightness;
+        }
+      };
+      xhr.send();
+    }
+    window.onload = fetchStatus;
+  </script>
+</body>
+</html>"""
+
+
+@app.route('/')
+def index():
+    return Response(INDEX_HTML, mimetype='text/html')
+
+
+@app.route('/brightness', methods=['POST'])
+def handle_brightness():
+    value = request.form.get('value')
+    if value is not None:
+        with _lock:
+            state['brightness'] = max(0, min(100, int(value)))
+    return 'OK'
+
+
+@app.route('/toggle-program', methods=['POST'])
+def handle_toggle():
+    program = request.form.get('program')
+    enabled_str = request.form.get('enabled')
+    if not program or enabled_str is None:
+        return 'Missing program or enabled parameter', 400
+    enabled = enabled_str.lower() == 'true'
+    key_map = {
+        'top_text': 'program_top_text_enabled',
+        'bottom_text': 'program_bottom_text_enabled',
+        'vehicles': 'program_vehicles_enabled',
+    }
+    if program not in key_map:
+        return 'Unknown program', 400
+    with _lock:
+        state[key_map[program]] = enabled
+    return 'OK'
+
+
+@app.route('/program-status', methods=['GET'])
+def handle_status():
+    with _lock:
+        s = dict(state)
+    return jsonify({
+        'top_text': s['program_top_text_enabled'],
+        'bottom_text': s['program_bottom_text_enabled'],
+        'vehicles': s['program_vehicles_enabled'],
+        'brightness': s['brightness'],
+    })
+
+
+def start_server(host='0.0.0.0', port=80):
+    t = threading.Thread(target=lambda: app.run(host=host, port=port, use_reloader=False), daemon=True)
+    t.start()