Fix

main.py

@@ -28,6 +28,9 @@ button_pin = 18
 toggle_switch_left_pin = 15
 toggle_switch_right_pin = 14
 
+# Cleanup GPIO to avoid "channel already in use" errors
+GPIO.cleanup()
+
 GPIO.setmode(GPIO.BCM)
 GPIO.setup(button_pin, GPIO.IN, pull_up_down=GPIO.PUD_UP)
 GPIO.setup(toggle_switch_left_pin, GPIO.IN, pull_up_down=GPIO.PUD_DOWN)
@@ -237,4 +240,25 @@ def button_pressed(channel):
     animation_NR = (animation_NR + 1) % anzahl_animationen
     reset_animation = True
 
-GPIO.add_event_detect
+GPIO.add_event_detect(button_pin, GPIO.FALLING, callback=button_pressed, bouncetime=200)
+
+# Ensure GPIO cleanup on exit
+import atexit
+atexit.register(GPIO.cleanup)
+
+# Main loop
+try:
+    while True:
+        if animation_NR == 0:
+            licht_aus()
+        elif animation_NR == 1:
+            fernlicht_an()
+        elif animation_NR == 2:
+            rainbow()
+        elif animation_NR == 3:
+            police()
+        elif animation_NR == 4:
+            kit()
+        time.sleep(0.1)
+except KeyboardInterrupt:
+    GPIO.cleanup()