// create the square
  var square:Shape = new Shape();
  square.graphics.beginFill( 0xcccccc );
  square.graphics.drawRect( 0, 0, 20, 20 );
  square.graphics.endFill();
  square.x = 20;
  square.y = 20;
  this.addChild( square );
  
  // animate the square's position
  var animation:Animation = Animation.create( square, 2000, { x: 100, y: 200 } );
  

  package
  {
   import fl.motion.easing.Back;
   import flash.display.Shape;
   import com.yahoo.astra.animation.Animation;
   import com.yahoo.astra.animation.AnimationEvent;
  
   public class AnimationExample extends Sprite
   {
    public function AnimationExample
    {
     // Create a simple circular display object
     this.circle = new Shape();
     this.circle.graphics.beginFill(0xcccccc);
     this.circle.graphics.drawEllipse(0, 0, 50, 50);
     this.circle.graphics.endFill();
     this.addChild(circle);
  
     // Create the instance animating over 1500ms from 0 to 1
     this.animation = new Animation( 1500, { alpha: 0.0 }, { alpha: 1.0 } );
  
     // Use an easing equation
     this.animation.easingFunction = Back.easeOut;
  
     // Listen for events to update our circle's values
     this.animation.addEventListener( AnimationEvent.UPDATE, animationUpdateHandler );
     this.animation.addEventListener( AnimationEvent.COMPLETE, animationCompleteHandler );
    }
  
    // Should be a member variable so that the garbage collector doesn't
    // remove the instance from memory before it finishes
    private var animation:Animation;
  
    // The display object whose properties we will animate
    private var circle:Shape;
  
    private function animationUpdateHandler(event:AnimationEvent):void
    {
     this.circle.alpha = event.parameters.alpha;
    }
  
    private function animationCompleteHandler(event:AnimationEvent):void
    {
     this.animationUpdateHandler(event);
  
     // Set the animation instance to null to ensure garbage collection
     this.animation = null;
    }
   }
  }