Zeno’s [classic easeOut]

stage.frameRate = 30;
var circle:Shape = Shape(addChild(new Shape()));
with(circle.graphics) beginFill(0x000000), drawCircle(0,0,10);
circle.y = 50;

addEventListener(Event.ENTER_FRAME, onLoop);
function onLoop(evt:Event):void {
	circle.x += (mouseX - circle.x) / 12;
}