Delay movement how?

Hello,
I have an object that you can control with the arrow keys, and I also have another object that have this code:

this._y = _root.object_mc._y
this._x = _root.object_mc._x

Alright, but I want my second object to wait one second before getting the same position as object_mc, and when object_mc moves again the second object will keep delaying one second before getting the new position.
Is that possible?

Thanks.