from machine import Pin

import time




car_green = Pin(19, Pin.OUT)

car_red   = Pin(5, Pin.OUT)

ped_green = Pin(21, Pin.OUT)

button    = Pin(22, Pin.IN)


def normal_state():

    car_green.value(1)  

    car_red.value(0)

    ped_green.value(0)   


def cross_state():

    car_green.value(0)

    car_red.value(1)   

    ped_green.value(1)  


while True:

  

    if button.value() == 1:

        

        cross_state()

        time.sleep(3)

        normal_state() 
    time.sleep(5)