Moving mc towards the move slowly towards the mouse

Hiya newbie here

I just want to know how to move a movieclip towards the mouse slowly.

i have used this code to get the mc to the mouse, but i am stuck on how i make it move slowly towards it.
please help
thanks

onClipEvent(enterFrame){

this._x = _root._xmouse;
this._y = _root._ymouse;
}