import machine
# import RPi.GPIO as GPIO
import time
pin=machine.Pin(18,machine.Pin.OUT)
# GPIO.setmode(GPIO.BCM)
# GPIO.setup(18,GPIO.OUT)
while True:
    pin.value(1)
    time.sleep(2)
    # GPIO.output(18,False)
    pin.value(0)
    time.sleep(2)