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ActionScript

package
{
    import flash.display.*;
    import flash.events.*;
    import flash.filters.*;
    import flash.geom.*;
    import flash.utils.*;
    [SWF(width=465, height=465, frameRate=45, backgroundColor=0x0)]
    
    public class Shaaa extends Sprite
    {
        /** const */
        public static const SW:Number = 465;
        public static const SH:Number = 465;
        public static const SC:Number = SW*0.5;
        public static const SM:Number = SH*0.5;
        public static const MAX:int = 150;
        public static const DELAY:int = 100;
        
        /** display object */
        private var _container:Sprite;
        private var _bg:Shape;
        
        /** var */
        private var lights:Vector.<Light>;
        private var timer:Timer;
        private var r:Number;
        private var ct:ColorTransform;
        
        public function Shaaa()
        {
            super();
            Light.init();//
            lights = new Vector.<Light>();
            r = Math.random()*360;
            ct = new ColorTransform();
            
            var m:Matrix = new Matrix();
            var a:int = Math.min( SW, SH);
            m.createGradientBox( a, a, 0, (SW-a)*0.5, (SH-a)*0.5);
            _bg = new Shape();
            _bg.filters = [new GlowFilter( 0x0, 0.3, 128, 128, 1, 2, true)];
            _bg.graphics.beginGradientFill( GradientType.RADIAL, [0xFFFFFF, 0x808080], [1,1], [0x0,0xFF], m);
            _bg.graphics.drawRect( 0, 0, SW, SH);
            _bg.graphics.endFill();
            _container = new Sprite();
            _container.x = SC;
            _container.y = SM;
            addChild( _bg );
            addChild( _container );
            
            timer = new Timer(DELAY);
            timer.addEventListener( TimerEvent.TIMER, onTimer);//
            timer.start();
            onTimer();//
            this.addEventListener( Event.ENTER_FRAME, update);//
        }
        
        /** UPDATE */
        private function update( e:Event ):void
        {
            var l:Light;
            if( lights.length < MAX )
            {
                l = new Light();
                lights.push( l );
                _container.addChild( l );
            }
            for each( l in lights) l.update();
        }
        
        /** TIMER */
        private function onTimer( e:TimerEvent=null ):void
        {
            r += 1;
            ct.redMultiplier = Math.sin(r*Math.PI/180);
            ct.greenMultiplier = Math.sin((r+120)*Math.PI/180);
            ct.blueMultiplier = Math.sin((r+240)*Math.PI/180);
            this.transform.colorTransform = ct;
        }
        
        
    }
}

import flash.display.*;
import flash.geom.*;
import flash.filters.*;

class Light extends Sprite
{
    /** STATIC */
    public static const AR:int = 2;
    public static const BR:int = 10;
    public static const RADIUS:int = 225;
    public static const COL:int = 0xFFFFFF;
    public static const BLUR:int = 8;
    public static var source:BitmapData;
    
    /** Display Object */
    private var _bmp:Bitmap;
    
    /** var */
    private var rad:Number;
    private var a:Number;
    private var v:Number;
    
    public function Light()
    {
        super();
        this.x = Math.random()*800;
        this.y = Math.random()*600;
        this._bmp = new Bitmap(source);
        addChild( _bmp );
        reset();//
    }
    
    /** UPDATE */
    public function update():void
    {
        v += a;
        this.scaleX = this.scaleY += v*0.02;
        this.x += Math.cos(rad)*v;
        this.y += Math.sin(rad)*v;
        if( this.x > Shaaa.SC || this.x < -Shaaa.SC || this.y > Shaaa.SM || this.y < -Shaaa.SM) reset();
    }
    
    /** REST */
    private function reset():void
    {
        var r:Number = Math.random()*360;
        this.alpha = Math.random()*0.5 + 0.5;
        this.scaleX = this.scaleY = 0.05;
        this.rotation = r
        this.rad = r/180*Math.PI;
        this.a = Math.random()*5;
        this.x = Math.cos(rad)*RADIUS/a;
        this.y = Math.sin(rad)*RADIUS/a;
        _bmp.scaleX = _bmp.scaleY = a*0.1;
        _bmp.y = -(BR+BLUR*0.5)*_bmp.scaleX;
        v = 0;
    }
    
    /** STATIC INIT */
    public static function init():void
    {
        var m:Matrix = new Matrix();
        m.createGradientBox( RADIUS*0.5, BR*2, 0, 0, 0);
        var s:Sprite = new Sprite();
        s.filters = [new BlurFilter(BLUR,BLUR,3)];
        s.graphics.beginGradientFill( GradientType.LINEAR, [COL, COL, COL], [0, 1, 0], [0x0,0x80,0xFF], m); 
        s.graphics.moveTo( 0, -AR);
        s.graphics.lineTo( RADIUS*0.5, -BR);
        s.graphics.lineTo( RADIUS*0.5, BR);
        s.graphics.lineTo( 0, AR);
        s.graphics.lineTo( 0, -AR);
        s.graphics.endFill();
        m = new Matrix();
        m.tx = BLUR*0.5;
        m.ty = BR+BLUR*0.5;
        source = new BitmapData( s.width+BLUR, s.height+BLUR, true, 0x0);
        source.draw( s, m);
    }

}

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