from machine import Pin
from time import sleep

# Definir los pines de los 3 LEDs
led1 = Pin(16, Pin.OUT)
led2 = Pin(17, Pin.OUT)
led3 = Pin(18, Pin.OUT)

while True:
    # Encender los leds
    led1.value(1)
    sleep(0.5)
    led2.value(1)
    sleep(0.5)
    led3.value(1)
    sleep(0.5)

    #Apagar los leds
    led3.value(0)
    sleep(0.5)
    led2.value(0)
    sleep(0.5)
    led1.value(0)    
    sleep(0.5)