from machine import Pin,PWM
from time import sleep

auto_verte = Pin(3, Pin.OUT)
auto_rojo = Pin(9, Pin.OUT)
peaton = Pin(2, Pin.OUT)
boton = Pin(17, Pin.IN, Pin.PULL_DOWN)
buzzer = PWM(Pin(15))

while True:
    auto_verde.on()
    auto_rojo.off()
    peaton.off()
    buzzer.duty_u16(0)

    if boton.value() == 1:
        buzzer.freq(1000)
        buzzer.duty_u16(30000)
        auto_verte.off()
        auto_rojo.on()
        sleep(1)
        peaton.on()
        sleep(4)
        peaton.off()
        sleep(1)
        auto_rojo.off()
        sleep(0.5)