from machine import Pin
from time import sleep

# Asignar los pines de los LEDs en una lista
led_pins = [Pin(2, Pin.OUT), Pin(4, Pin.OUT), Pin(5, Pin.OUT), Pin(18, Pin.OUT), Pin(19, Pin.OUT), Pin(21, Pin.OUT)]

while True:
    # Encender los LEDs uno por uno
    for led in led_pins:
        led.on()
        sleep(0.5)
        led.off()
    
    # Secuencia inversa
    for led in reversed(led_pins):
        led.on()
        sleep(0.5)
        led.off()