// Definisi pin
const int tombol1 = 2;
const int tombol2 = 3;
const int led1 = 4;
const int led2 = 5;
const int led3 = 6;
const int led4 = 7;

void setup() {
  // Konfigurasi pin tombol sebagai input
  pinMode(tombol1, INPUT);
  pinMode(tombol2, INPUT);

  // Konfigurasi pin LED sebagai output
  pinMode(led1, OUTPUT);
  pinMode(led2, OUTPUT);
  pinMode(led3, OUTPUT);
  pinMode(led4, OUTPUT);
}

void loop() {
  // Membaca status tombol
  bool statusTombol1 = digitalRead(tombol1);
  bool statusTombol2 = digitalRead(tombol2);

  if (statusTombol1 && statusTombol2) {
    // Kasus: Tombol 1 dan Tombol 2 ditekan bersamaan
    // Mode running LED (1 detik)
    digitalWrite(led1, HIGH);
    digitalWrite(led2, LOW);
    digitalWrite(led3, LOW);
    digitalWrite(led4, LOW);
    delay(1000);

    digitalWrite(led1, LOW);
    digitalWrite(led2, HIGH);
    digitalWrite(led3, LOW);
    digitalWrite(led4, LOW);
    delay(1000);

    digitalWrite(led1, LOW);
    digitalWrite(led2, LOW);
    digitalWrite(led3, HIGH);
    digitalWrite(led4, LOW);
    delay(1000);

    digitalWrite(led1, LOW);
    digitalWrite(led2, LOW);
    digitalWrite(led3, LOW);
    digitalWrite(led4, HIGH);
    delay(1000);
  } else if (statusTombol1) {
    // Kasus: Tombol 1 saja yang ditekan
    // Flip-flop LED 1,2 dengan LED 3,4 (1 detik)
    digitalWrite(led1, HIGH);
    digitalWrite(led2, HIGH);
    digitalWrite(led3, LOW);
    digitalWrite(led4, LOW);
    delay(1000);

    digitalWrite(led1, LOW);
    digitalWrite(led2, LOW);
    digitalWrite(led3, HIGH);
    digitalWrite(led4, HIGH);
    delay(1000);
  } else if (statusTombol2) {
    // Kasus: Tombol 2 saja yang ditekan
    // Flip-flop LED 1,4 dengan LED 2,3 (0,5 detik)
    digitalWrite(led1, HIGH);
    digitalWrite(led4, HIGH);
    digitalWrite(led2, LOW);
    digitalWrite(led3, LOW);
    delay(500);

    digitalWrite(led1, LOW);
    digitalWrite(led4, LOW);
    digitalWrite(led2, HIGH);
    digitalWrite(led3, HIGH);
    delay(500);
  } else {
    // Kasus: Tidak ada tombol yang ditekan
    // Semua LED menyala
    digitalWrite(led1, HIGH);
    digitalWrite(led2, HIGH);
    digitalWrite(led3, HIGH);
    digitalWrite(led4, HIGH);
  }
}