円をランダムに描画

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

package { 
    import flash.display.Sprite;
    import flash.display.MovieClip;
    import flash.events.Event;

    
    [SWF(width="400", height="400", backgroundColor="#FFFFFF", frameRate="50")]    
    public class ClickDraw extends Sprite{
      	
        public function ClickDraw():void {
           stage.addEventListener(Event.ENTER_FRAME,onEnterFrame);
        }
            
        private function onEnterFrame(e:Event):void {
        	    var rX:int = Math.random() * stage.stageWidth;  
        	    var rY:int = Math.random() * stage.stageHeight;  
            var nR:int = Math.ceil(Math.random() * 10) * (Math.random() * 10);
           　var color:int = Math.floor(Math.random() * 0xffffff);
            var oneCircle:MovieClip = new DrawCircle(rX 
                                                     ,rY
                                                     ,nR
                                                     ,color);
            oneCircle.x = rX;
            oneCircle.y = rY;
            stage.addChild(oneCircle);
        }
    }
}

    import flash.display.Sprite;
    import flash.display.MovieClip;
    import flash.events.Event;
    
    import flash.display.MovieClip;
    class DrawCircle extends MovieClip{
		private var defPoint:int;
    
    　　　 public function DrawCircle(centerX:int
                                   ,centerY:int
                                   ,r:int
                                   ,color:int){

          graphics.beginFill(color);
          graphics.drawCircle(x,y,r);
          graphics.endFill();          
          addEventListener(Event.ENTER_FRAME,fadeOut);  

        }
        
        private function fadeOut(e:Event):void{
        
          scaleX *= 1.05;
          scaleY *= 1.05;
          this.alpha   -=　0.05;
          if(alpha <= 0){
             stage.removeChild(this);
          }
        
        }

      }