import machine
from machine import Pin
from time import sleep


led0 = Pin(2, Pin.OUT)
led1 = Pin(0, Pin.OUT)
led2 = Pin(4, Pin.OUT)

while True:
    
    led0.on()
    sleep(1)
    led0.off()

    
    led1.on()
    sleep(1)
    led1.off()

    
    led2.on()
    sleep(1)
    led2.off()