Mouse follwo with easing - reverse?

Hi, ive just used the actionscript from the follow tutorial

http://www.kirupa.com/developer/mx/followease.htm

here’s the code ive used:

onClipEvent (load) {
_x = 0;
_y = 0;
speed = 5;
}
onClipEvent (enterFrame) {
endX = _root._xmouse;
endY = _root._ymouse;
_x += (endX-_x)/speed;
_y += (endY-_y)/speed;
}

How can i reverse it so that the movieclip moves the opposite direction from my mouse pointer?