css update

templates/index.html

@@ -108,8 +108,8 @@
 
     <div class="viz-type-dropdown">
         <div class="viz-type-options">
-            <button data-type="bars" class="active">Circular Bars</button>
-            <button data-type="sphere">Sphere</button>
+            <button data-type="sphere" class="active">Sphere</button>
+            <button data-type="bars">Circular Bars</button>
             <button data-type="particles">Particles</button>
         </div>
     </div>