int buzz = 5;
int leds[] = {6, 7, 8, 9, 10, 11, 12, 13};

void setup() {
  for (int i = 0; i < sizeof(leds) / sizeof(leds[0]); i++) {
    pinMode(leds[i], OUTPUT);
  }
  pinMode(buzz, OUTPUT);
}

void loop() {
  SOL(); delay(150); DIAM(); delay(80); SOL(); delay(150);
  DIAM(); delay(80); SOL(); delay(150); DIAM(); delay(100);
  FA(); delay(150); DIAM(); delay(40); MI(); delay(150); RE(); delay(200);
  MI(); delay(200); FA(); delay(100); SOL(); delay(250);
  FA(); delay(100); MI(); delay(100); RE(); delay(150);
  FA(); delay(250); MI(); delay(250); LA(); delay(250);
  LA(); delay(250); LA(); delay(250); SI(); delay(250);
  DOO(); delay(250); SI(); delay(250); LA(); delay(250);
  SOL(); delay(250); FA(); delay(250); SOL(); delay(250);
  MI(); delay(250); RE(); delay(250); RE(); delay(250);
  RE(); delay(250); MI(); delay(250); FA(); delay(250);
  MI(); delay(250); RE(); delay(250); MI(); delay(250);
  FA(); delay(250); SOL(); delay(250); LA(); delay(250);
  DOO(); delay(250); SI(); delay(250); LA(); delay(250);
  SOL(); delay(250); RE(); delay(250); FA(); delay(250);
  MI(); delay(250); RE(); delay(250); DO(); delay(250);
}

void DO() {
  playTone(262, 0);
}

void RE() {
  playTone(294, 1);
}

void MI() {
  playTone(330, 2);
}

void FA() {
  playTone(349, 3);
}

void SOL() {
  playTone(395, 4);
}

void LA() {
  playTone(440, 5);
}

void SI() {
  playTone(494, 6);
}

void DOO() {
  playTone(523, 7);
}

void DIAM() {
  noTone(buzz);
}

void playTone(int frequency, int ledIndex) {
  tone(buzz, frequency);
  digitalWrite(leds[ledIndex], HIGH);
  delay(100);
  digitalWrite(leds[ledIndex], LOW);
  noTone(buzz);
}