<div class='preview-container'>
  <div id='preview-canvas-container' class="canvas-container">
    <div class="canvas-background"></div>
  </div>
  <div>
    <span id="display-fps" class="display-fps">12 FPS</span>
    <input id="preview-fps" class="range-fps" type="range" min="1" max="24" value="12"/>
  </div>   
</div>