Mobile carousels are driven with Endeca cartridges and configured in Experience Manager. See the Commerce Reference Store Overview for more information.

In its basic form (without styling or content), the homepage when rendered would appear as follows, where there can be any number of <div> elements of class cell:

<div id="homeTopSlot">
  <div id="homeTopSlotContent">
      <div class="cell"></div>
      <div class="cell"></div>
      <div class="cell"></div>
  </div>
  <div id="circlesContainer"></div>
</div>
<div class="itemsContainer details">
  <div id="horizontalContainer1">
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    <div class="cell"></div>
    ...
  </div>
  ...
</div>