void setup() {
  // put your setup code here, to run once:
pinMode(2,INPUT);
pinMode(3,INPUT);
pinMode(4,INPUT);
pinMode(5,INPUT);
pinMode(6,INPUT);
pinMode(7,INPUT);
pinMode(8,INPUT);
pinMode(9,INPUT);
pinMode(10,OUTPUT);

digitalWrite(2,HIGH);
digitalWrite(3,HIGH);
digitalWrite(4,HIGH);
digitalWrite(5,HIGH);
digitalWrite(6,HIGH);
digitalWrite(7,HIGH);
digitalWrite(8,HIGH);
digitalWrite(9,HIGH);
}

void loop() {
 //put your main code here, to run repeatedly:
if(digitalRead(2) == LOW){
  tone(10,264);
  delay(50);
}
if(digitalRead(3) == LOW){
  tone(10,294);
  delay(50);
}
if(digitalRead(4) == LOW){
  tone(10,330);
  delay(50);
}
if(digitalRead(5) == LOW){
  tone(10,349);
  delay(50);
}
if(digitalRead(6) == LOW){
  tone(10,392);
  delay(50);
}
if(digitalRead(7) == LOW){
  tone(10,440);
  delay(50);
}
if(digitalRead(8) == LOW){
  tone(10,493);
  delay(50);
}
if(digitalRead(9) == LOW){
  tone(10,528);
  delay(50);
}

}