diff --git a/demo/visualizing-set-relations.html b/demo/visualizing-set-relations.html
index 89f3bfa..0fb613b 100644
--- a/demo/visualizing-set-relations.html
+++ b/demo/visualizing-set-relations.html
@@ -26,14 +26,20 @@
         pointer-events: none;
         background-color: #b4d8f669;
       }
+
+      h1 {
+        margin: 0;
+        width: fit-content;
+      }
     </style>
   </head>
   <body>
+    <h1>This is a Convex Hull</h1>
     <folk-shape x="50" y="100" width="50" height="50"></folk-shape>
     <folk-shape x="200" y="200" width="50" height="50"></folk-shape>
     <folk-shape x="100" y="300" width="50" height="50"></folk-shape>
 
-    <folk-hull sources="folk-shape"></folk-hull>
+    <folk-hull sources="h1, folk-shape"></folk-hull>
 
     <script type="module">
       import '../src/standalone/folk-shape.ts';
