from machine import Pin
from time import sleep

led_merah = Pin(14, Pin.OUT)
led_kuning = Pin(15, Pin.OUT)
led_hijau = Pin(16, Pin.OUT)

while True:
    print("Merah HIDUP (Berhenti)")
    led_merah.value(1)
    led_kuning.value(0)
    led_hijau.value(0)
    sleep(3)  

    print("Kuning HIDUP (Siap-siap)")
    led_merah.value(0)
    led_kuning.value(1)
    led_hijau.value(0)
    sleep(1)  

    print("Hijau HIDUP (Jalan)")
    led_merah.value(0)
    led_kuning.value(0)
    led_hijau.value(1)
    sleep(3)