const int speakerPin = 9;// piezo sounder connected to pin9
const int btn1 = 2;
const int btn2 = 3;
const int led1 = 5;

#define TUNE1 7
 const int notes_tune1[TUNE1] = {262, 262, 294, 262,349, 330, 0};

const int beats_tune1[TUNE1] = {1, 1, 2, 2, 2, 4, 4 };

#define TUNE2 15
const int notes_tune2[TUNE2] = { 262, 262, 392, 392,440, 440, 392, 349,349, 330, 330, 294,294, 262, 0};
const int beats_tune2[TUNE2] = {1, 1, 1, 1, 1, 1, 2, 1, 1, 1, 1, 1, 1, 2, 4 };

const int tempo = 300;

//SETUP
void setup()
{
 pinMode(speakerPin, OUTPUT);
 pinMode(btn1, INPUT_PULLUP);
 pinMode(btn2, INPUT_PULLUP);
 pinMode(led1,OUTPUT);
}

void playTune1(){
 for (int i = 0; i < TUNE1; i++) {

  if (notes_tune1[i] == 0){
    delay(beats_tune1[i] * tempo); // rest
  }

  else {
    ourTone(notes_tune1[i], beats_tune1[i] * tempo);
  }

  delay(tempo / 2);
  }
}

void playTune2(){
 for (int i = 0; i < TUNE2; i++) {
  if (notes_tune2[i] == 0) {
    delay(beats_tune2[i] * tempo); // rest
  }
  else {
    ourTone(notes_tune2[i], beats_tune2[i] * tempo);
  }

  delay(tempo / 2);
  }
}

void ourTone(int freq, int duration) {
  tone(speakerPin, freq, duration);
  digitalWrite(led1,HIGH); //lights on
  delay(duration);
  digitalWrite(led1,LOW); //lights off
  noTone(speakerPin);
}

//LOOP
void loop()
{
 if(digitalRead(btn1) == LOW){
  playTune1();
 }

 if(digitalRead(btn2) == LOW){
  playTune2();
 }
}