#define buzPin 13

int musicPin[7] = {23, 22, 21, 19, 18, 5, 4}; 
int ledPin[7] = {14, 2, 32, 33, 25, 26, 27};
int freq[7] = {262, 294, 330, 349, 392, 440, 494};

void setup() {
  Serial.begin(115200);
  pinMode(buzPin, OUTPUT);
  for (int i = 0; i < 7; i++) {
    pinMode(musicPin[i], INPUT_PULLDOWN);
    pinMode(ledPin[i], OUTPUT);
    digitalWrite(ledPin[i], LOW);
  }
}

void loop() {
  for (int i = 0; i < 7; i++) {
    int value = digitalRead(musicPin[i]);
    if (value == HIGH) { 
      digitalWrite(ledPin[i], value);
      tone(buzPin, freq[i]);
      delay(250);
      noTone(buzPin);
      digitalWrite(ledPin[i], LOW);
      delay(50);
    }else{
      digitalWrite(ledPin[i], LOW);
    }
  }
}