onSelfEvent (rollOver) {
    _parent.overFollower._x = this._x + .25;
    // the .25 is an adjustment for the boundary of the sprite
    // this makes the follower line up more perfectly
}
onSelfEvent (press) {
    _parent.pressFollower._x = this._x + .25;
    // the .25 is an adjustment for the boundary of the sprite
    // this makes the follower line up more perfectly
}