Changing refresh intervals

webui/index.html

@@ -8,7 +8,7 @@
     <link rel="stylesheet" href="/waterfall.css">
     <title>Waterfall</title>
   </head>
-  <body>
+  <body background="#FFF">
     <div id="app"></div>
     <script type="module" src="/src/main.js"></script>
   </body>