from machine import Pin # Pin Import
from time import sleep # Pin sleep
led = Pin("LED",Pin.OUT)
led1 = Pin(0,Pin.OUT)
led2 = Pin(2,Pin.OUT)
led3 = Pin(3,Pin.OUT)
while True:
    led.value(1)
    led1.value(1)
    led2.value(1)
    led3.value(1)
    sleep(1)
    led.value(0)
    led1.value(0)
    led2.value(0)
    led3.value(0)
    sleep(1)