from machine import Pin
from utime import sleep, sleep_ms

led0=Pin(15, Pin.OUT)
led1=Pin(2, Pin.OUT)
led2=Pin(4, Pin.OUT)
led3=Pin(5, Pin.OUT)
led4=Pin(18, Pin.OUT)
led5=Pin(19, Pin.OUT)
led6=Pin(21, Pin.OUT)
led7=Pin(22, Pin.OUT)


leds=[led0, led1, led2, led3, led4, led5, led6, led7]

while True:

  for bombillo in leds[::1]:
    bombillo.on()
    sleep_ms(40)
    bombillo.off()
    sleep_ms(40)
  for bombillo in leds[::-1]:
    bombillo.on()
    sleep_ms(40)
    bombillo.off()
    sleep_ms(40)