from machine import Pin
from time import sleep

ledRojo    = Pin(19,Pin.OUT)
ledAzul    = Pin(21,Pin.OUT)
ledNaranja = Pin(22,Pin.OUT)
ledVerde   = Pin(23,Pin.OUT)

while True:
  ledVerde.off()
  ledNaranja.off()
  ledAzul.off()
  ledRojo.off()
  sleep(1)
  ledVerde.on()
  sleep(1)
  ledNaranja.on()
  sleep(1)
  ledAzul.on()
  sleep(1)
  ledRojo.on()
  sleep(1)