int Sensor = A0;
boolean status_lights = false;

void setup() {
  pinMode(Sensor, INPUT);
  pinMode(13, OUTPUT);
}

void loop() 
{
  int status_sensor = digitalRead(Sensor);

  // Add the delay here ..........
  delay(500);

  if (status_sensor == 0)
  
  {
    if (status_lights == true)
    {
      status_lights = false;
      digitalWrite(13, LOW);
    }
    else 
    
      status_lights = true;
      digitalWrite(13, HIGH);
    }
    // wait until the clap is over 
    delay(100);
  }