 
 import spark.components.Group;
 import spark.effects.animation.Animation;
+import spark.effects.animation.Keyframe;
 import spark.effects.animation.MotionPath;
 import spark.effects.animation.SimpleMotionPath;
 import spark.primitives.supportClasses.GraphicElement;

    public var alphaFrom:Number;
    
    //----------------------------------
    //  alphaFrom
    //----------------------------------

    /** 

        {
            makeInvisible = true;
        }

        motionPaths = new <MotionPath>[new MotionPath("alpha")];
        motionPaths[0].keyframes = new <Keyframe>[new Keyframe(0, alphaFrom), 
            new Keyframe(duration, alphaTo)];
        
        super.play();
    }
