<div class="bigDiv">
         <div class="smallDive">

         </div>
          <div class="smallDive">

         </div>
         <div class="smallDive">

         </div>
         //...
    </div>

    .bigDive{
       position:relative;
       //...
     }
     .smallDiv{
       position:absolute;
       //...
     }