Loops & Scripts

Scripts run once by default. To keep a script running continuously, use a while loop:

while True:
  # this runs every game tick
  print("running")

The interpreter automatically gives time back to the game while loops run. World systems and other scripts keep moving, so you do not need sleep() to make a loop safe.

Use sleep() only when you intentionally want game time to pass before the script continues:

while True:
  print("every 5 seconds")
  sleep(5)

For loops iterate over a list:

for i in range(5):
  print(i)

See Long-Running Scripts for designing loops that re-read machine state and remain safe when a running script starts again after a game load.

See also

• Language Reference: if/else, while, for, and match syntax
• Code Editor: run, pause, and stop controls