from machine import Pin
import utime

rojo = Pin(27,Pin.OUT)
amarillo = Pin(26,Pin.OUT)
verde = Pin(25,Pin.OUT)
buzzer = Pin(21,Pin.OUT)

while True:
  rojo.off()
  verde.on()
  for i in range(3):
    buzzer.on()
    utime.sleep_ms(500)
    buzzer.off()
    utime.sleep_ms(500)
  verde.off()
  amarillo.on()
  for i in range(5):
    buzzer.on()
    utime.sleep_ms(100)
    buzzer.off()
    utime.sleep_ms(100)
  amarillo.off()
  rojo.on()
  for i in range(1):
    buzzer.on()
    utime.sleep_ms(3000)
    buzzer.off()
    utime.sleep_ms(3000)