#define BUZZER 8

// =======================
//  FREKUENSI NADA
// =======================
#define NOTE_C4  262
#define NOTE_CS4 277
#define NOTE_D4  294
#define NOTE_DS4 311
#define NOTE_E4  330
#define NOTE_F4  349
#define NOTE_FS4 370
#define NOTE_G4  392
#define NOTE_GS4 415
#define NOTE_A4  440
#define NOTE_AS4 466
#define NOTE_B4  494
#define NOTE_C5  523
#define NOTE_CS5 554
#define NOTE_D5  587
#define NOTE_DS5 622
#define NOTE_E5  659
#define NOTE_F5  698
#define NOTE_FS5 740
#define NOTE_G5  784
#define NOTE_GS5 830
#define NOTE_A5  880
#define NOTE_AS5 932
#define NOTE_B5  988

// =======================
//  MELODI TETRIS PANJANG
// =======================
int melody[] = {
  NOTE_E5, NOTE_B4, NOTE_C5, NOTE_D5,
  NOTE_C5, NOTE_B4, NOTE_A4, NOTE_A4,
  NOTE_C5, NOTE_E5, NOTE_D5, NOTE_C5,
  NOTE_B4, NOTE_C5, NOTE_D5, NOTE_E5,
  NOTE_C5, NOTE_A4, NOTE_A4, 0,

  NOTE_D5, NOTE_F5, NOTE_A5,
  NOTE_G5, NOTE_F5, NOTE_E5, NOTE_C5,
  NOTE_E5, NOTE_D5, NOTE_C5, NOTE_B4,
  NOTE_B4, NOTE_C5, NOTE_D5, NOTE_E5,
  NOTE_C5, NOTE_A4, NOTE_A4, 0,

  NOTE_E4, NOTE_G4, NOTE_C5, NOTE_D5,
  NOTE_E5, NOTE_C5, NOTE_B4, NOTE_A4,
  NOTE_A4, NOTE_C5, NOTE_E5,
  NOTE_D5, NOTE_C5, NOTE_B4, NOTE_C5,
  NOTE_D5, NOTE_E5, NOTE_C5, NOTE_A4, NOTE_A4, 0
};

// Durasi per nada
int noteDurations[] = {
  8,8,8,8,
  8,8,8,8,
  8,8,8,8,
  8,8,8,8,
  8,8,4,4,

  8,8,8,
  8,8,8,8,
  8,8,8,8,
  8,8,8,8,
  8,8,4,4,

  8,8,8,8,
  8,8,8,8,
  4,4,4,
  8,8,8,8,
  8,8,4,4,4,4
};

// =======================
//   PLAY FUNCTION (LAMBAT)
// =======================

void playTone(int noteFreq, int duration) {
  if (noteFreq == 0) {
    delay(duration * 2.2);   // jeda nada lebih panjang → tempo lambat
    return;
  }

  tone(BUZZER, noteFreq, duration * 2.2);
  delay(duration * 2.2 * 1.3);  // jeda antar nada juga diperlambat
}


// =======================
void setup() {
  pinMode(BUZZER, OUTPUT);

  int notes = sizeof(melody) / sizeof(melody[0]);

  for (int i = 0; i < notes; i++) {
    int duration = 1000 / noteDurations[i];
    playTone(melody[i], duration);
  }
}

void loop() {}