package {
    import flash.display.*;
    import flash.events.*;
    
    // When the user clicks an empty area of the Stage instance, this class
    // draws a randomly sized and colored circle. When the user clicks 
    // a circle, this class removes that circle from the screen.
    public class @ax-actionscript-misc-CircleClicker extends Sprite {
      public function @ax-actionscript-misc-CircleClicker () {
        stage.addEventListener(MouseEvent.CLICK, clickListener);
      }
  
      private function clickListener (e:MouseEvent):void {
        // If the event target is the Stage instance
        if (e.target == stage) {
          // ...draw a circle
          drawCircle(e.stageX, e.stageY);
        } else {
          // ... otherwise, the event target must be a Sprite object 
          // containing a circle, so remove it
          removeChild(DisplayObject(e.target));
        }
      }
  
      public function drawCircle (x:int, y:int):void {
        var randomColor:int = Math.floor(Math.random()*0xFFFFFF);
        var randomSize:int = 10 + Math.floor(Math.random()*150);
        var circle:Sprite = new Sprite()
        circle.graphics.beginFill(randomColor, 1);
        circle.graphics.lineStyle();
        circle.graphics.drawEllipse(0, 0,randomSize, randomSize);
        circle.x = x-randomSize/2;
        circle.y = y-randomSize/2;
        addChild(circle);
      }
    }
  }