volatile boolean item;

void setup(){
  item = false;
  pinMode(13, OUTPUT);
  pinMode(11, OUTPUT);
  pinMode(12, INPUT);
  digitalWrite(13,HIGH);
  digitalWrite(13,LOW);
  item = digitalRead(12);
}

void loop(){
  if (item == true) {
    digitalWrite(13,LOW);
    tone(11,131);

  } else {
    digitalWrite(13,HIGH);

  }

  if (digitalRead(12) == 0) {
    delay(500);
    item = !item;

  }

}