from machine import Pin
from utime import sleep

led_pin = [Pin(2, Pin.OUT), Pin(3, Pin.OUT), Pin(4, Pin.OUT), Pin(5, Pin.OUT)]
messege = ['Vehicles moving', 'stedy', 'Pendestrian walk']

led_blue = Pin(10, Pin.OUT)
pb = Pin(20, Pin.IN, Pin.PULL_UP)

pause = False

def interup(Pin):
    global pause
    pause = True

pb.irq(trigger = Pin.IRQ_FALLING, handler= interup)

while True:

    if pause:

      led_blue.on()

      for i in range (3):
        led_pin[i-1].off()
        led_pin[i].on()
        print(messege[i])
        sleep(1)
      
      sleep(3)

      for x in reversed (range(3)):
        led_pin[x+1].off()
        led_pin[x].on()
        print(messege[x])
        sleep(1)

      pause = False

    else:
        led_pin[0].on()
        led_blue.off()
        print (messege[0])
        sleep(0.5)