diff --git a/app.html b/app.html
index 9358c9db..ff378eae 100644
--- a/app.html
+++ b/app.html
@@ -45,16 +45,16 @@
           </div>
           <div class="col-xs-12">
             <div id="owl-example" class="owl-carousel owl-theme">
-              <div class="item col-xs-12">
+              <div class="item col-xs-12 uhk__layer-wrapper uhk__layer-wrapper--base">
                 <img src="./images/base-layer.svg" class="uhk uhk--base-layer" alt="">
               </div>
-              <div class="item col-xs-12">
+              <div class="item col-xs-12 uhk__layer-wrapper uhk__layer-wrapper--mod">
                 <img src="./images/base-layer.svg" class="uhk uhk--base-layer" alt="">
               </div>
-              <div class="item col-xs-12">
+              <div class="item col-xs-12 uhk__layer-wrapper uhk__layer-wrapper--fn">
                 <img src="./images/base-layer.svg" class="uhk uhk--base-layer" alt="">
               </div>
-              <div class="item col-xs-12">
+              <div class="item col-xs-12 uhk__layer-wrapper uhk__layer-wrapper--mouse">
                 <img src="./images/base-layer.svg" class="uhk uhk--base-layer" alt="">
               </div>
             </div>