#Programa para encender leds con bucles
from machine import Pin
import time

leds = [Pin(i, Pin.OUT) for i in (22, 21, 19, 18, 5, 4, 2, 15)]

while True:
  for led in leds:
    led.value(1)
    time.sleep(0.4)
    led.value(0)
  for led in reversed (leds):
    led.value(1)
    time.sleep(0.5)
    led.value(0)