           <div class="front">
               <div class="line"></div>
               <div class="door"></div>
           </div>
           <div class="side">
               <div class="line"></div>
               <div class="windows"></div>
           </div>
           <div class="tree"></div>
           <div class="tree tree2"></div>
       </div>
    </div>
</body>
</html>