anchor.diff:  part of periodic_table;
   
   class ElementIcon extends Sprite {
  +
  +  Tween _mouseOverTween = null;
   
     ElementIcon(Map element, int categoryColor) {
   
  
positive.code:     this.pivotY = 25;
      this.useHandCursor = true;
      this.mouseChildren = false;
  
      this.graphics.beginPath();
      this.graphics.rectRound(3, 3, 44, 44, 4, 4);
  
negative.code:     addChild(numberTextField);
    }
  
    //-----------------------------------------------------------------------------------------------
    //-----------------------------------------------------------------------------------------------
  
    _onMouseOver(Event event) {
  
      this.parent.addChild(this);
  
      var juggler = this.stage.juggler;
      juggler.remove(_mouseOverTween);
  
      _mouseOverTween = new Tween(this, 0.25, TransitionFunction.easeOutQuadratic);
      _mouseOverTween.animate.scaleX.to(1.5);
      _mouseOverTween.animate.scaleY.to(1.5);
      juggler.add(_mouseOverTween);
    }
  
    //-----------------------------------------------------------------------------------------------
  
    _onMouseOut(Event event) {
  
      this.parent.addChild(this);
  
      var juggler = this.stage.juggler;
      juggler.remove(_mouseOverTween);
  
      _mouseOverTween = new Tween(this, 0.25, TransitionFunction.easeOutQuadratic);
      _mouseOverTween.animate.scaleX.to(1.0);
      _mouseOverTween.animate.scaleY.to(1.0);
      juggler.add(_mouseOverTween);
    }
  
  
  }