anchor.diff:      ..y = 20.0 + 200.0 * scaling
       ..scaleX = 0.5 + 0.5 * scaling
       ..scaleY = 0.5 + 0.5 * scaling
  +    ..addTo(stage)
       ..play();
   
     stage.sortChildren((c1, c2) {
  
positive.code:   // Let's add a tween so the man walks from the left to the right.
    //------------------------------------------------------------------
  
    var tween = new Tween(flipBook, 5.0 + (1.0 - scaling) * 5.0, TransitionFunction.linear)
      ..animate.x.to(940.0)
      ..onComplete = () => stopAnimation(flipBook);
  
    stage.addChild(flipBook);
    stage.juggler
      ..add(flipBook)
      ..add(tween)
  
negative.code:   // Initialize the Display List
    //------------------------------------------------------------------
  
    stage = new Stage("myStage", html.querySelector('#stage'));
    renderLoop = new RenderLoop();
    renderLoop.addStage(stage);
  
  