Bluetooth controller light

/*
 *  Bluetooh Basic
 *  Website - https://earthbondhon.com/arduino-bluetooth-controller-lamp-with-relay-module/
 *  Download the App : https://drive.google.com/open?id=1qvWglHJsDgepvZR3xCUbs210-ozNjHz7
 *  This program lets you to control a LED on pin 13 of arduino using a bluetooth module
 */
char Incoming_value = 0;                //Variable for storing Incoming_value
void setup()
{
  Serial.begin(9600);         //Sets the data rate in bits per second (baud) for serial data transmission
  pinMode(13, OUTPUT);        //Sets digital pin 13 as output pin
}
void loop()
{
  if(Serial.available() > 0)
  {
    Incoming_value = Serial.read();      //Read the incoming data and store it into variable Incoming_value
    Serial.print(Incoming_value);        //Print Value of Incoming_value in Serial monitor
    Serial.print("\n");        //New line
    if(Incoming_value == '1')            //Checks whether value of Incoming_value is equal to 1
      digitalWrite(13, HIGH);  //If value is 1 then LED turns ON
    else if(Incoming_value == '0')       //Checks whether value of Incoming_value is equal to 0
      digitalWrite(13, LOW);   //If value is 0 then LED turns OFF
  }

}