const int led1 = 2;
const int led2 = 3;
const int led3 = 4;
const int numLEDs = 3;
const int ledPins[] = {2, 3, 4};


void setup() {
  // put your setup code here, to run once:
  pinMode(led1, OUTPUT);
  pinMode(led2, OUTPUT);
  pinMode(led3, OUTPUT);
  Serial.begin(9600);
}

void loop() {
  // put your main code here, to run repeatedly:
  nyalakanLampu();

  delay(2000);

  matikanLampu();

  delay(2000);

  runningLampu();

  delay(2000);
}

void nyalakanLampu(){
  digitalWrite(led1, HIGH);
  digitalWrite(led2, HIGH);
  digitalWrite(led3, HIGH);
  Serial.println("Lampu Dinyalakan");
}

void matikanLampu(){
  digitalWrite(led1, LOW);
  digitalWrite(led2, LOW);
  digitalWrite(led3, LOW);
  Serial.println("Lampu Dimatikan.");
}

void runningLampu(){
  for(int i = 0; i < numLEDs; i++){
    digitalWrite(ledPins[i], HIGH); //  Nyalakan LED saati ini
    delay(1000);  //  Tunggu sebentar
    digitalWrite(ledPins[i], LOW);  //  Matikan LED saat ini
  }
  Serial.println("Lampu Running");
}