from machine import Pin 
from time import sleep
led_merah = Pin(1, Pin.OUT)
led_kuning = Pin(15, Pin.OUT)
led_hijau = Pin(12, Pin.OUT)
while True:
    led_merah.value(1)
        print("LED HIDUP")
            sleep(1)
                led_merah.value(0)
                    print("LED Mati")
                        sleep(1)
                            led_kuning.value(1)
                                print("LED HIDUP")
                                    sleep(1)
                                        led_kuning.value(0)
                                            print("LED Mati")
                                                sleep(1)
                                                    led_hijau.value(1)
                                                        print("LED HIDUP")
                                                            sleep(1)
                                                                led_hijau.value(0)
                                                                    print("LED Mati")
                                                                        sleep(1)