<mx:Script>
     <![CDATA[
      import mx.core.UIComponent;  // only needed if you use the second method
      import flash.display.Sprite;
      import flash.events.Event;
      import flash.events.MouseEvent;
    
      public var circle:Sprite;
  
      public var xpos:Number = 50;
      public var ypos:Number = 50;