#include "pitches.h"

#define SPEAKER_PIN 8

const int melody[] = {
  NOTE_D5, NOTE_D5, NOTE_D5, NOTE_D5,
  NOTE_AS4, NOTE_C5, NOTE_D5, NOTE_CS5,
  NOTE_D5
};

const int noteDurations[] = {
  4, 4, 4, 2,
  2, 2, 4, 4,
  1
};

void buzzer() {
  // iterate over the notes of the melody:
  int size = sizeof(noteDurations) / sizeof(int);

  for (int thisNote = 0; thisNote < size; thisNote++) {
    // to calculate the note duration, take one second divided by the note type.
    //e.g. quarter note = 1000 / 4, eighth note = 1000/8, etc.
    int noteDuration = 1000 / noteDurations[thisNote];
    tone(SPEAKER_PIN, melody[thisNote], noteDuration);

    // to distinguish the notes, set a minimum time between them.
    // the note's duration + 30% seems to work well:
    int pauseBetweenNotes = noteDuration * 1.30;
    delay(pauseBetweenNotes);
    // stop the tone playing:
    noTone(SPEAKER_PIN);
  }
}


void setup() {
  pinMode(SPEAKER_PIN, OUTPUT);
}

void loop() {
  buzzer();
}