{F8} flash newbie vrs kirupa hit test tutorial

programming flash
1

Hi there!
I’ve just used the hit test tutorial for my scrolling gallery, now I want to add roll over buttons on the sides to reverse the movement of the movie.
Here is the hit test script:
onClipEvent (enterFrame)

{ move = this._x;
if (number == 1) {
this._x = move-1;
}
if (number ==2) {
this._x = move+1;
}

if (this.b, hitTest(_root.right1)) {
number = 1;
}
if (this.a, hitTest(_root.left1)) {
    number = 2;
}

}

and here is the button…
on (rollOver) {
}
I have no idea what to put inside! something saying if this = ._x +1; then make it do this._x - 1; and vise versa…
Can someone let me know or what tutorial will teach me how to write it?
Thanks you!:rabbit: