void setup() {
  // put your setup code here, to run once:
  pinMode(13, OUTPUT);
  pinMode(8,INPUT );
  pinMode(9, OUTPUT);
  pinMode(0, OUTPUT);
  pinMode(12, OUTPUT);
  pinMode(7, INPUT);
}

void loop() {
  // put your main code here, to run repeatedly:
  if(digitalRead(8)==1){
    digitalWrite(13, HIGH);
    digitalWrite(12, LOW);
    tone(9,1000,100);
  }
  if(digitalRead(7)==1){
    digitalWrite(12, HIGH);
    digitalWrite(13, LOW);
    tone(9,20,100);
  }
}