from machine import Pin
from time import sleep
led1 = Pin(5,Pin.OUT)
LED2 = Pin(9,Pin.OUT)
led3 = Pin(13,Pin.OUT)
while True:
    led1.value(1)
    sleep(1)
    led1.value(0)
    sleep(1)
    LED2.value(1)
    sleep(1)
    LED2.value(0)
    sleep(1)
    led3.value(1)
    sleep(1)
    led3.value(0)
    sleep(1)