const int tombol = 2;
const int led1 = 12;
const int led2 = 11;
const int led3 = 10;

bool lampu = false;
bool tombolSebelumnya = HIGH;

void setup() {
  pinMode(tombol, INPUT_PULLUP);

  pinMode(led1, OUTPUT);
  pinMode(led2, OUTPUT);
  pinMode(led3, OUTPUT);

  digitalWrite(led1, LOW);
  digitalWrite(led2, LOW);
  digitalWrite(led3, LOW);
}

void loop() {
  int tombolSekarang = digitalRead(tombol);

  // Jika tombol ditekan
  if (tombolSebelumnya == HIGH && tombolSekarang == LOW) {
   lampu = !lampu;
   delay(200);
  }

  tombolSebelumnya = tombolSekarang;

  // Semua lampu menyala atau mati
  if (lampu) {
   digitalWrite(led1, HIGH);
   digitalWrite(led2, HIGH);
   digitalWrite(led3, HIGH);
  } else {
   digitalWrite(led1, LOW);
   digitalWrite(led2, LOW);
   digitalWrite(led3, LOW);
  }
}