#include "pitches.h"

static const int tempo = 130;
static const float duration = 60000 / tempo * 4;

int melody[] = {
  NOTE_G5, NOTE_FS5, NOTE_G5, 0 
};

int noteDurations[] = {
  8, 8, 8, 8
};

#define PIN_SPEAKER 3

void setup() {

}

void loop() {
  for (int i = 0; i < sizeof(melody) / sizeof(int); i++) {
    int noteDuration = duration / noteDurations[i];
    tone(PIN_SPEAKER, melody[i], noteDuration);
    delay(noteDuration);
    noTone(PIN_SPEAKER);
  }
}