#define NOTE_C 16.35
#define NOTE_D 18.35
#define NOTE_E 20.60
#define NOTE_F 21.83
#define NOTE_G 24.60
#define NOTE_A 27.50
#define NOTE_B 30.87

int BUZZER = 2;
int SCALE = 7;

float music[] = {
  NOTE_C, NOTE_D, NOTE_E, NOTE_F,
  NOTE_G, NOTE_A, NOTE_B
};

int indexMusic = 0;
int maxIndexMusic = (sizeof(music) / sizeof(music[0])) - 1;


void setup() {
  pinMode(2, OUTPUT);
}

void loop() {
  //funçao do buzzer, frequencia do som, quanto tempo o som vai tocar(substituimos pelo delay)
  int note = music[indexMusic] * (SCALE + 1);
  tone(BUZZER, note); //qnt menor a frequencia = mais agudo 
  delay(500);
  noTone(BUZZER);
  delay(250);

  indexMusic++;
  if(indexMusic > maxIndexMusic) indexMusic = 0;
}