import board
import digitalio
import time

led = digitalio.DigitalInOut(board.GP0)
led.direction = digitalio.Direction.OUTPUT

while True:
    led.value = True  # LED einschalten (High)
    time.sleep(0.5)   # 0,5 Sekunden warten
    led.value = False  # LED ausschalten (Low)
    time.sleep(0.5)   # 0,5 Sekunden warten