#define buzzer 11

int melody[] = {
  659,8, 587,8, 370,4, 415,4, 
  554,8, 494,8, 294,4, 330,4, 
  494,8, 440,8, 277,4, 330,4,
  440,2, 
};

// sizeof gives the number of bytes, each int value is composed of two bytes (16 bits)
// there are two values per note (pitch and duration), so for each note there are four bytes


int divider = 0, noteDuration = 0;

void setup() {
  // iterate over the notes of the melody.
  // Remember, the array is twice the number of notes (notes + durations)
  for (int thisNote = 0; thisNote < 26; thisNote = thisNote + 2) {

    // calculates the duration of each note
    divider = melody[thisNote + 1];
    noteDuration = 800 / divider;

    // we only play the note for 90% of the duration, leaving 10% as a pause
    tone(buzzer, melody[thisNote], noteDuration * 0.9);

    // Wait for the specief duration before playing the next note.
    delay(noteDuration);

    // stop the waveform generation before the next note.
    noTone(buzzer);
  }
}

void loop(){}