Fall of ball on 2012-8-28

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

package
{    
    import flash.display.Sprite;
    import flash.events.Event;
    [SWF(width="600", height="600", frameRate="60")]
    
    public class Main extends Sprite
    {
        private static const WIDTH:Number = 600;
        private const HEIGHT:Number = 600;
        
        public function Main()
        {    
            setCircle();    
        }
        
        private function setCircle():void
        {
            for (var i:int = 0; i < 50; i++) 
            {
                var c:Sprite = new Circle(Math.random()*0xFFFFFF);
                c.x = Math.random()*WIDTH;
                c.y = Math.random()*HEIGHT;
                addChild(c);
            }
        }
    }
}


import flash.display.Sprite;
import flash.events.Event;
import flash.events.MouseEvent;

class Circle extends Sprite
{
    private var R:Boolean = false, L:Boolean = false;
    private var mFlag:Boolean = false;
    private var vx:Number,vy:Number,g:Number=0.5;
    
    public function Circle(color:uint=0xFF0000):void{
        graphics.lineStyle(5,color);
        graphics.beginFill(color,0.4);
        graphics.drawCircle(0,0,40);
        graphics.endFill();
        
        vx = (Math.random()*2-1)*10;
        vy = -Math.random()*10;
        
        addEventListener(Event.ENTER_FRAME,onEnterFrame);
        addEventListener(MouseEvent.CLICK,onClick);
    }
    
    private function onEnterFrame(event:Event):void
    {
        if(!mFlag) return;
        
        vy += g;
        this.x += vx;
        this.y += vy;
    }
    
    private function onClick(e:MouseEvent):void
    {
        mFlag = true;
        stage.focus = this;
    }
}