import time
from machine import Pin

led=Pin(18,Pin.OUT)

while True:
    led.value(1)
    time.sleep(0.5)
    led.value(0)
    time.sleep(0.5)


# import RPi.GPIO as GPIO
# import time

# GPIO.setmode(GPIO.BCM)
# GPIO.setup(18,GPIO.OUT)

# while True:
#   GPIO.output(18,True)
#   time.sleep(2)
#   GPIO.output(18,False)