cool

/**
 * Copyright bradsedito ( http://wonderfl.net/user/bradsedito )
 * MIT License ( http://www.opensource.org/licenses/mit-license.php )
 * Downloaded from: http://wonderfl.net/c/itKC
 */






package {
    import flash.display.Sprite;
    import flash.events.Event;
    import idv.cjcat.stardust.common.clocks.SteadyClock;
    import idv.cjcat.stardust.twoD.renderers.DisplayObjectRenderer;
    
    [SWF(backgroundColor="#000000", frameRate=60)]
    
    public class Main extends Sprite {
        
        private var emitter:CircleEmitter;
        
        public function Main():void {
            emitter = new CircleEmitter(new SteadyClock(0.5));
            var renderer:DisplayObjectRenderer = new DisplayObjectRenderer(this);
            renderer.addEmitter(emitter);
            
            addEventListener(Event.ENTER_FRAME, mainLoop);
        }
        
        private function mainLoop(e:Event):void {
            emitter.point.x = mouseX;
            emitter.point.y = mouseY;
            emitter.step();
        }
    }
}

//------------------------------------------------------------------------------------------------

import flash.display.BlendMode;
import flash.display.LineScaleMode;
import flash.display.Shape;
import idv.cjcat.stardust.common.actions.Age;
import idv.cjcat.stardust.common.actions.DeathLife;
import idv.cjcat.stardust.common.actions.ScaleCurve;
import idv.cjcat.stardust.common.clocks.Clock;
import idv.cjcat.stardust.common.initializers.Life;
import idv.cjcat.stardust.common.initializers.Scale;
import idv.cjcat.stardust.common.math.UniformRandom;
import idv.cjcat.stardust.twoD.actions.Move;
import idv.cjcat.stardust.twoD.emitters.Emitter2D;
import idv.cjcat.stardust.twoD.initializers.DisplayObjectClass;
import idv.cjcat.stardust.twoD.initializers.Position;
import idv.cjcat.stardust.twoD.initializers.Velocity;
import idv.cjcat.stardust.twoD.zones.LazySectorZone;
import idv.cjcat.stardust.twoD.zones.SinglePoint;

//------------------------------------------------------------------------------------------------

//I have no idea why this line must be added in order to compile successfully on Wonderfl.
//Just ignore this class :p
class BugFixer extends Shape { public function BugFixer() { } }

//------------------------------------------------------------------------------------------------

class CircleEmitter extends Emitter2D {
    
    public var point:SinglePoint;
    
    public function CircleEmitter(clock:Clock) {
        super(clock);
        
        //initializers
        point = new SinglePoint();
        addInitializer(new DisplayObjectClass(Circle));
        addInitializer(new Life(new UniformRandom(30, 30)));
        addInitializer(new Position(point));
        addInitializer(new Velocity(new LazySectorZone(1, 1)));
        addInitializer(new Scale(new UniformRandom(.8, 0.6)));
        
        //actions
        addAction(new Age());
        addAction(new DeathLife());
        addAction(new Move());
        addAction(new ScaleCurve(10, 10));
    }
}

//------------------------------------------------------------------------------------------------

class Circle extends Shape {
    import flash.filters.BlurFilter;
    
    public function Circle() {
        blendMode = BlendMode.ADD;
        var bf:BlurFilter = new BlurFilter(10,10,3);
        this.filters = [bf];
        
        
        graphics.lineStyle(0, 0, 1, false, LineScaleMode.HORIZONTAL);
        graphics.beginFill(uint(0xFFFFFF * Math.random()), 0.5 + 0.5 * Math.random());
        graphics.drawCircle(0, 0, 30);
    }
}