from machine import Pin
import time

# Led Setup
led_red = Pin(5, Pin.OUT)
led_yellow = Pin(4, Pin.OUT)
led_green = Pin(2, Pin.OUT)

traffic_light = [led_green, led_yellow, led_red]

while True:

    for led in traffic_light:
        led.on()
        time.sleep(5)
        led.off()