import machine
import utime
import _thread

led_red = machine.Pin(15, machine.Pin.OUT)
led_amber = machine.Pin(14, machine.Pin.OUT)
led_green = machine.Pin(13, machine.Pin.OUT)
button = machine.Pin(12, machine.Pin.IN)
buzzer = machine.Pin(16, machine.Pin.OUT)

global button_pressed
button_pressed = False
def button_reader_thread():
  global button_pressed
  while True:
    if button.value() == 1:
      button_pressed = True
      _thread.start_new_thread(button_reader_thread, ())
  while True:
    if button_pressed == True:
      led_red.value(1)
      for i in range(10):
        buzzer.value(1)
        utime.sleep(0.2)
        buzzer.value(0)
        utime.sleep(0.2)
      global button_pressed
      button_pressed = False
    led_red.value(1)
    utime.sleep(5)
    led_amber.value(1)
    utime.sleep(2)
    led_red.value(0)
    led_amber.value(0)
    led_green.value(1)
    utime.sleep(5)
    led_green.value(0)
    led_amber.value(1)
    utime.sleep(5)
    led_amber.value(0)