from machine import Pin, PWM
from time import sleep

rojo = Pin(2, Pin.OUT)
buzzer = PWM(Pin(12))
boton = Pin(21, Pin.IN, Pin.PULL_DOWN)

while True:
    if boton.value() == 1:
        rojo.on()
        sleep(0.2)
        rojo.off()
        sleep(0.2)
        buzzer.freq(500)
        buzzer.duty_u16(30000)

    else:
        rojo.off()
        buzzer.duty_u16(0)