/*
  JoJo's Bizarre Adventure Inspired Melody with LED Rhythm
  Connect a piezo buzzer or speaker to pin 11 or select a new pin.
  Connect two LEDs to pins 12 and 13 with appropriate resistors.
*/

#define NOTE_C4  262
#define NOTE_D4  294
#define NOTE_E4  330
#define NOTE_F4  349
#define NOTE_G4  392
#define NOTE_A4  440
#define NOTE_B4  494
#define NOTE_C5  523
#define NOTE_D5  587
#define NOTE_E5  659
#define NOTE_F5  698
#define NOTE_G5  784
#define NOTE_A5  880
#define NOTE_B5  988
#define NOTE_C6  1047
#define REST     0

int tempo = 120;
int buzzer = 18;
int led1 = 12;
int led2 = 13;

int melody[] = {
  NOTE_C4, 8, NOTE_E4, 8, NOTE_G4, 8, NOTE_C5, 4, NOTE_B4, 8, NOTE_G4, 8, // Measure 1
  NOTE_A4, 8, NOTE_C5, 8, NOTE_D5, 4, NOTE_C5, 8, NOTE_A4, 8, NOTE_G4, 8, // Measure 2
  NOTE_G4, 8, NOTE_B4, 8, NOTE_C5, 4, NOTE_E5, 8, NOTE_D5, 8, NOTE_C5, 8, // Measure 3
  NOTE_B4, 8, NOTE_A4, 8, NOTE_G4, 4, REST, 4, // Measure 4

  NOTE_F4, 8, NOTE_A4, 8, NOTE_C5, 8, NOTE_F5, 4, NOTE_E5, 8, NOTE_C5, 8, // Measure 5
  NOTE_D5, 8, NOTE_F5, 8, NOTE_G5, 4, NOTE_F5, 8, NOTE_D5, 8, NOTE_C5, 8, // Measure 6
  NOTE_E4, 8, NOTE_G4, 8, NOTE_B4, 4, NOTE_D5, 8, NOTE_C5, 8, NOTE_B4, 8, // Measure 7
  NOTE_A4, 8, NOTE_G4, 8, NOTE_F4, 4, REST, 4, // Measure 8

  NOTE_E4, 8, NOTE_G4, 8, NOTE_C5, 8, NOTE_E5, 4, NOTE_D5, 8, NOTE_B4, 8, // Measure 9
  NOTE_C5, 8, NOTE_E5, 8, NOTE_G5, 4, NOTE_F5, 8, NOTE_E5, 8, NOTE_D5, 8, // Measure 10
  NOTE_C5, 8, NOTE_A4, 8, NOTE_G4, 4, NOTE_F4, 8, NOTE_E4, 8, NOTE_D4, 8, // Measure 11
  NOTE_C4, 8, NOTE_G4, 8, NOTE_C5, 4, REST, 4 // Measure 12
};

int notes = sizeof(melody) / sizeof(melody[0]) / 2;
int wholenote = (60000 * 4) / tempo;
int divider = 0, noteDuration = 0;

void setup() {
  pinMode(buzzer, OUTPUT);
  pinMode(led1, OUTPUT);
  pinMode(led2, OUTPUT);

  for (int thisNote = 0; thisNote < notes * 2; thisNote = thisNote + 2) {
    divider = melody[thisNote + 1];
    if (divider > 0) {
      noteDuration = (wholenote) / divider;
    } else if (divider < 0) {
      noteDuration = (wholenote) / abs(divider);
      noteDuration *= 1.5;
    }

    tone(buzzer, melody[thisNote], noteDuration * 0.9);

    // Blink LEDs in rhythm with the melody
    digitalWrite(led1, HIGH);
    digitalWrite(led2, LOW);
    delay(noteDuration * 0.45);
    digitalWrite(led1, LOW);
    digitalWrite(led2, HIGH);
    delay(noteDuration * 0.45);

    noTone(buzzer);
  }
}

void loop() {
  // no need to repeat the melody.
}