Spawning Objects to Stage and making them move a certain distance in a given direction.

Question

Here is my code:
function createEnemy(event:TimerEvent):void
                var enemyAppear = new MovieClip;
                enemyAppear = new Enemy();
                enemyAppear.x = Math.random()*stage.stageWidth;
                enemyAppear.y = 285;
                enemyStorage.addChild(enemyAppear);
                //Removes Enemy From Stage and adds a point to scoreboard
                stage.addEventListener(MouseEvent.CLICK, clickEnemy);
                function clickEnemy(event:MouseEvent):void
                if(cursor.hitTestObject(enemyAppear))
                        enemyAppear.parent.removeChild(enemyAppear);
                        stage.removeEventListener(MouseEvent.CLICK, clickEnemy);
                        score++
                        messageDisplay.text = String(score);
What I am trying to do is spawn a enemy to stage and when it appears on the stage I would like it to move across the stage a certain distance.
Visual Example:
O = enemy,   X = original position, Y = new position
O (Spawns @ Location X)   X ---------------------------------------------------------> Y ( Moved from location X to Location Y)
Any help would be appreciated.
Thanks Casey

Answer 1

You can start by trying the built-in Tween class, and if you're happy with getting that working the way you want, you can consider moving on to a third party tweening class such as TweenLite...
import fl.transitions.Tween;
var certainDistance:Number = 200;
var moveTime:Number = 2; // seconds
function createEnemy(event:TimerEvent):void
                var enemyAppear = new Enemy();
                enemyAppear.x = Math.random()*stage.stageWidth;
                enemyAppear.y = 285;
                enemyStorage.addChild(enemyAppear);
                //Removes Enemy From Stage and adds a point to scoreboard
                stage.addEventListener(MouseEvent.CLICK, clickEnemy);
                 var tweenX:Tween = new Tween(enemyAppear, "x", null, enemyAppear.x, enemyAppear.x+certainDistance, moveTime, true);// tween out
                function clickEnemy(event:MouseEvent):void
                if(cursor.hitTestObject(enemyAppear))
                        enemyAppear.parent.removeChild(enemyAppear);
                        stage.removeEventListener(MouseEvent.CLICK, clickEnemy);
                        score++
                        //messageDisplay.text = String(score);