Arduino - Panic Alarm, Relay With ALARM. KY-019 Example

/*
Author: Danny van den Brande, Arduinosensors.nl. BlueCore Tech.
In this example i show you how to use the KY-019 Relay with the KY-004 button module.
I attached a 12v alarm siren with strobe. to the relay in the video but 
you can add anything you like offcourse. the Idea now is that
it is functioning as a alarm/panic alarm that can only be turned off when reset.
If you want it to work otherwise you need to Uncomment the commented part 
in the void loop section of the code.
*/
int Relay = 3;
int Button = 10;
boolean val;

void setup() {
  pinMode(Relay, OUTPUT);
  pinMode(Button, INPUT);
  
}

void loop() {
  val = digitalRead (Button);
    if (val == 0)
    {
    digitalWrite (Relay, HIGH);
//    }      //Uncomment if you want the relay only
//    else   //to be on when holding the button.
//    {      //now the alarm need to be reset to turn it off.
//    digitalWrite (Relay, LOW);  
  }
}