Stageclass centering and easing

1

Stage.scaleMode = “noScale”;
Stage.align = “LT”;

main_mc.onResize = function() {

    main_mc._y += (Stage.height/2-main_mc._y)/15;
    
	main_mc._x += (Stage.width/2-main_mc._x)/15;

};
Stage.addListener(main_mc);
stop();

I have that… it will only move when you resize… I want it so that when you resize it will finish all the way to the center.