How modificate this script from mouse click to release

Question

how modificate this script from mouse click to release
package
* A Colorful Fireworks Demonstration in Actionscript 3
*   from shinedraw.com
import flash.events.MouseEvent;
import flash.system.ApplicationDomain;
import flash.events.Event;
import flash.display.MovieClip;
import com.shinedraw.effects.ColorfulFireworks;
public class Document extends MovieClip{
private var _colorfulFireworks : ColorfulFireworks;
public function Document(){
this.addEventListener(Event.ADDED_TO_STAGE, on_added_to_stage);
private function on_added_to_stage(e : Event):void{
// place the object to the stage
_colorfulFireworks = new ColorfulFireworks();
addChild(_colorfulFireworks);
// add the cover to save CPU time
var coverClass : Class = ApplicationDomain.currentDomain.getDefinition("Cover") as Class;
var cover : MovieClip = new coverClass();
addChild(cover);
cover.addEventListener(MouseEvent.CLICK, on_cover_click);
// remove the cover after click
private function on_cover_click(e:MouseEvent):void{
var cover:MovieClip = e.target as MovieClip;
removeChild(cover);
_colorfulFireworks.start();

Answer 1

solved close pls