i'm creating a game with flixel, and I want to have a effect when you mouse over a tile, I tried implementing it, and this is what it gives:

    public class GameState extends FlxState
{
    private var block:EmptyBlock;
    public function GameState() 
    {

    }

    override public function create():void {
        for (var i:Number = 0; i < 30; i++) {
            block = new EmptyBlock(i, 20);
            block.create();
        }
    }

    override public function update():void {
            block.update();
            super.update();
    }
}

}

GameState class

and here is the EmptyBlock class:

public class EmptyBlock 
    {

    private var x:int;
    private var y:int;
    private var row:FlxRect
    public function EmptyBlock(x:int, y:int ) 
    {
        this.x = x;
        this.y = y;
    }

    public function create():void {
         row = new FlxRect(x, y, 32, 32);
        trace ("Created block at" + x + y);
    }

    public function update():void {
        if (FlxG.mouse.screenX == row.x) {
            if (FlxG.mouse.screenY == row.y) {
                var outline:FlxSprite = new FlxSprite(row.x, row.y).makeGraphic(row.width, row.height, 0x002525);
            }
        }
    }


}

}