Need help with spacing out movieclips created with addChild

programming flash
1

So I’m adding these movieclips which have textfields inside them and I’m trying to space each new movieclip. Currently they are being placed on top of each other.
_taskX and _taskY are variables which I define down there. Thanks for the help!

public function onClick(event:MouseEvent):void
        {
            _taskX = 300;
            _taskY = 100;
            
            _newTask = inputTask_txt.text;
            _task = new Task();
            _task.x = _taskX;
            _task.y = _taskY;
            _taskY += _task.height + 20;
            _task.taskName_txt.text = _newTask;
            addChild(_task);
            ;
            
        }