const int BTN_PINS[] = {12, 11, 10};
const int LED_PINS[] = {6, 5, 3};
const int BUZZ_PIN   = 2;

void setup() {
  Serial.begin(115200);
  for (int count = 0; count < 3; count++) {
    pinMode(BTN_PINS[count], INPUT_PULLUP);
    pinMode(LED_PINS[count], OUTPUT);
  }
  //pinMode(BUZZ_PIN, OUTPUT);
  Serial.println("Ready");
}

void loop() {
  if (BTN_PINS[0] == LOW) {
    Serial.println("Here");
    tone(BUZZ_PIN, 220);
    digitalWrite(LED_PINS[0], HIGH);
  } else if (BTN_PINS[1] == LOW)  {
    tone(BUZZ_PIN, 440);
  } else if (BTN_PINS[2] == LOW)  {
    tone(BUZZ_PIN, 880);
  } else {
    noTone(BUZZ_PIN);
  }
}