Move back tween

Reset movement to the back in frames
For example, the figure advances to the back
Or go back in the same path of progress ???

For example, I have two buttons
When the first is pressed, the shape advances forward, but if pressed on the other, it returns back
How to do it ??

this.stop();
var root = this;

this.cover4.addEventListener("mousedown", cover4_4.bind(this));
function cover4_4(evt) {
this.gotoAndPlay(11);
this.flipbook.gotoAndPlay(1);
}

this.cover3.addEventListener("mousedown", cover3_3.bind(this));
function cover3_3(evt) {
this.gotoAndStop(0);
this.flipbook.gotoAndPlay(1);
}

please help