#define C 2109.89
#define D 1879.69
#define E 1674.62
#define f 1580.63
#define G 1408.18
#define R 0

// define pin
int speakerOut = 26;
int DEBUG = 1;
void setup() {
  pinMode(speakerOut, OUTPUT);
  if (DEBUG) {
    Serial.begin(9600);
  }
}

double melody[] = {
  E, E, E, R,
  E, E, E, R,
  E, G, C, D,
  E, R, R, R,
  f, f, f, f,
  f, E, E, E,
  E, D, D, E,
  D, R, G, R,
};

int MAX_COUNT = sizeof(melody) / 2;
int paaus = 1000;
int tone_ = 0;
long duration  = 10000;

void playTone() {
  long elapsed_time = 0;
  if (tone_ > 0) {
    while (elapsed_time <= duration) {
      digitalWrite(speakerOut, HIGH);
      delayMicroseconds(tone_/2);
      digitalWrite(speakerOut, LOW);
      delayMicroseconds(tone_/2);
      elapsed_time += (tone_);
    }
  } else {
    digitalWrite(speakerOut, LOW);
    delayMicroseconds(duration);
  }
}

void loop() {
  for (int i = 0; i < MAX_COUNT; i++) {
    tone_ = melody[i];
    playTone();
    delayMicroseconds(paaus);
  }
}