#define BUZZER_PIN 9  // Pin connected to the buzzer

// Note frequencies
#define NOTE_E5  659
#define NOTE_D5  587
#define NOTE_C5  523
#define NOTE_G5  784
#define NOTE_A5  880
#define NOTE_B5  988
#define NOTE_F5  698

// Melody for "Jingle Bells"
int melody[] = {
  NOTE_E5, NOTE_E5, NOTE_E5, 0, NOTE_E5, NOTE_E5, NOTE_E5, 0, 
  NOTE_E5, NOTE_G5, NOTE_C5, NOTE_D5, NOTE_E5, 0, 
  NOTE_F5, NOTE_F5, NOTE_F5, NOTE_F5, NOTE_F5, NOTE_E5, NOTE_E5, 
  NOTE_E5, NOTE_E5, NOTE_D5, NOTE_D5, NOTE_E5, NOTE_D5, 0, NOTE_G5,
  
  NOTE_E5, NOTE_E5, NOTE_E5, 0, NOTE_E5, NOTE_E5, NOTE_E5, 0, 
  NOTE_E5, NOTE_G5, NOTE_C5, NOTE_D5, NOTE_E5, 0, 
  NOTE_F5, NOTE_F5, NOTE_F5, NOTE_F5, NOTE_F5, NOTE_E5, NOTE_E5, 
  NOTE_E5, NOTE_G5, NOTE_G5, NOTE_F5, NOTE_D5, NOTE_C5, 0
};

// Note durations: 4 = quarter note, 8 = eighth note, etc.
int noteDurations[] = {
  8, 8, 4, 8, 8, 4, 8, 8, 
  8, 8, 8, 8, 2, 8, 
  8, 8, 8, 8, 8, 8, 8, 
  8, 8, 8, 8, 8, 4, 8, 2,

  8, 8, 4, 8, 8, 4, 8, 8, 
  8, 8, 8, 8, 2, 8, 
  8, 8, 8, 8, 8, 8, 8, 
  8, 8, 8, 8, 8, 4, 8
};

void setup() {
  // No setup required for the buzzer
}

void loop() {
  for (int i = 0; i < sizeof(melody) / sizeof(melody[0]); i++) {
    int duration = 1000 / noteDurations[i];  // Calculate note duration
    if (melody[i] == 0) {
      noTone(BUZZER_PIN);
    } else {
      tone(BUZZER_PIN, melody[i], duration);
    }
    delay(duration * 1.3);  // Slight pause between notes
  }
  
  delay(2000);  // Pause before repeating the song
}