from machine import Pin
import time

led_red = Pin(16, Pin.OUT)
led_yellow = Pin(17, Pin.OUT)
led_green = Pin(18, Pin.OUT)

#how stop with keyboard?

while True:
    led_green.toggle()
    time.sleep(4)
    led_green.toggle()
    time.sleep(0.2)

    led_yellow.toggle()
    time.sleep(2)
    led_yellow.toggle()
    time.sleep(0.2)

    led_red.toggle()
    time.sleep(4)
    led_red.toggle()
    time.sleep(0.2)

status = ("Would you like to stop? ")