from machine import Pin # Import Pin module 
from time import sleep # Import sleep function 

# Define LED on pin 0 as output 
led = Pin(0, Pin.OUT) # GPIO-0 external Lec

while True:
    led.on() # turn LED on 
    sleep(1) # wait 1 second 
    led.off() # turn LED off 
    sleep(1) # wait for 1 second