Rotate on button click.html

<div class="et-wrapper">
  <button class="et-rotate" et-in="rotateSlideIn" et-out="rotateSlideOut">Next</button>
  <div class="et-page">
   <h2>Page 1</h2>
 </div>
 <div class="et-page">
   <h2>Page 2</h2>
 </div>
</div>

The "Back" button does not go back its going forward again but because there isn't any other page it goes back to the beginning
How do you really implement "Back" button? you know to go to the previous page or to go to a specific page

Hi is there any way how to bind specific div once we clicked the button?
For example user hit button A so the transition will bind the div/content A, once it's B then bind the div/content B.
Looking forward your solution, thanks.