anchor.diff:      </div>
     </div>
   
  -  <div class="slide step" data-x="0" data-y="-600" data-z="-800">
  +  <div class="slide step" data-x="0" data-y="-600" data-z="-800" data-rotate="-90">
       <div class="slide-content">
         <h1>Slide 1</h1>
         <div class="place-holder">place holder</div>
  
positive.code:       <a href="#step-3"><i class="fa fa-angle-right fa-2x"></i></a>
      </div>
  
      <div class="slide step" data-x="0" data-y="-900" data-z="-1600">
        <div class="slide-content">
          <h1>Slide 2</h1>
          <div class="place-holder">place holder</div>
  
negative.code:         <a href="#step-4"><i class="fa fa-angle-right fa-2x"></i></a>
        </div>
  
        <div class="slide step" data-x="0" data-y="-1200" data-z="-2400" data-rotate="-90">
          <div class="slide-content">
            <h1>Slide 3</h1>
            <div class="place-holder">place holder</div>
  