from machine import Pin
import time

led_red = Pin(0,Pin.OUT)
led_yellow = Pin(2,Pin.OUT)
led_green = Pin(15,Pin.OUT)

while True:
    led_red.value(1)
    time.sleep(10)
    led_red.value(0)
    led_green.value(1)
    time.sleep(30)
    led_green.value(0)
    led_yellow.value(1)
    time.sleep(0.5)
    led_yellow.value(0)
    time.sleep(0.5)
    led_yellow.value(1)
    time.sleep(0.5)
    led_yellow.value(0)
    time.sleep(0.5)
    led_yellow.value(1)
    time.sleep(0.5)
    led_yellow.value(0)
    time.sleep(0.5)