diff --git a/server/public/assets/html/callback.html b/server/public/assets/html/callback.html
index 1ea72822..364b88cb 100755
--- a/server/public/assets/html/callback.html
+++ b/server/public/assets/html/callback.html
@@ -1,10 +1,176 @@
 <!DOCTYPE html>
 <html>
-  <head>
-    <title>Zoff OAuth Callback</title>
-    <script type="text/javascript" src="/assets/dist/callback.min.js"></script>
-    <meta charset="UTF-8"/>
-  </head>
-  <body>
-  </body>
+<head>
+  <title>Zoff OAuth Callback</title>
+  <script type="text/javascript" src="/assets/dist/callback.min.js"></script>
+  <meta charset="UTF-8"/>
+  <style>
+  @-webkit-keyframes uil-ring-anim {
+    0% {
+      -ms-transform: rotate(0deg);
+      -moz-transform: rotate(0deg);
+      -webkit-transform: rotate(0deg);
+      -o-transform: rotate(0deg);
+      transform: rotate(0deg);
+    }
+    100% {
+      -ms-transform: rotate(360deg);
+      -moz-transform: rotate(360deg);
+      -webkit-transform: rotate(360deg);
+      -o-transform: rotate(360deg);
+      transform: rotate(360deg);
+    }
+  }
+  @-webkit-keyframes uil-ring-anim {
+    0% {
+      -ms-transform: rotate(0deg);
+      -moz-transform: rotate(0deg);
+      -webkit-transform: rotate(0deg);
+      -o-transform: rotate(0deg);
+      transform: rotate(0deg);
+    }
+    100% {
+      -ms-transform: rotate(360deg);
+      -moz-transform: rotate(360deg);
+      -webkit-transform: rotate(360deg);
+      -o-transform: rotate(360deg);
+      transform: rotate(360deg);
+    }
+  }
+  @-moz-keyframes uil-ring-anim {
+    0% {
+      -ms-transform: rotate(0deg);
+      -moz-transform: rotate(0deg);
+      -webkit-transform: rotate(0deg);
+      -o-transform: rotate(0deg);
+      transform: rotate(0deg);
+    }
+    100% {
+      -ms-transform: rotate(360deg);
+      -moz-transform: rotate(360deg);
+      -webkit-transform: rotate(360deg);
+      -o-transform: rotate(360deg);
+      transform: rotate(360deg);
+    }
+  }
+  @-ms-keyframes uil-ring-anim {
+    0% {
+      -ms-transform: rotate(0deg);
+      -moz-transform: rotate(0deg);
+      -webkit-transform: rotate(0deg);
+      -o-transform: rotate(0deg);
+      transform: rotate(0deg);
+    }
+    100% {
+      -ms-transform: rotate(360deg);
+      -moz-transform: rotate(360deg);
+      -webkit-transform: rotate(360deg);
+      -o-transform: rotate(360deg);
+      transform: rotate(360deg);
+    }
+  }
+  @-moz-keyframes uil-ring-anim {
+    0% {
+      -ms-transform: rotate(0deg);
+      -moz-transform: rotate(0deg);
+      -webkit-transform: rotate(0deg);
+      -o-transform: rotate(0deg);
+      transform: rotate(0deg);
+    }
+    100% {
+      -ms-transform: rotate(360deg);
+      -moz-transform: rotate(360deg);
+      -webkit-transform: rotate(360deg);
+      -o-transform: rotate(360deg);
+      transform: rotate(360deg);
+    }
+  }
+  @-webkit-keyframes uil-ring-anim {
+    0% {
+      -ms-transform: rotate(0deg);
+      -moz-transform: rotate(0deg);
+      -webkit-transform: rotate(0deg);
+      -o-transform: rotate(0deg);
+      transform: rotate(0deg);
+    }
+    100% {
+      -ms-transform: rotate(360deg);
+      -moz-transform: rotate(360deg);
+      -webkit-transform: rotate(360deg);
+      -o-transform: rotate(360deg);
+      transform: rotate(360deg);
+    }
+  }
+  @-o-keyframes uil-ring-anim {
+    0% {
+      -ms-transform: rotate(0deg);
+      -moz-transform: rotate(0deg);
+      -webkit-transform: rotate(0deg);
+      -o-transform: rotate(0deg);
+      transform: rotate(0deg);
+    }
+    100% {
+      -ms-transform: rotate(360deg);
+      -moz-transform: rotate(360deg);
+      -webkit-transform: rotate(360deg);
+      -o-transform: rotate(360deg);
+      transform: rotate(360deg);
+    }
+  }
+  @keyframes uil-ring-anim {
+    0% {
+      -ms-transform: rotate(0deg);
+      -moz-transform: rotate(0deg);
+      -webkit-transform: rotate(0deg);
+      -o-transform: rotate(0deg);
+      transform: rotate(0deg);
+    }
+    100% {
+      -ms-transform: rotate(360deg);
+      -moz-transform: rotate(360deg);
+      -webkit-transform: rotate(360deg);
+      -o-transform: rotate(360deg);
+      transform: rotate(360deg);
+    }
+  }
+  .uil-ring-css {
+    background: none;
+    width: 190px;
+    height: 190px;
+    transform: scale(1);
+    position: absolute;
+    left: 0;
+    right: 0;
+    margin: auto;
+    top: 0;
+    bottom: 0;
+  }
+  .uil-ring-css > div {
+    position: absolute;
+    width: 150px;
+    height: 150px;
+    border: 20px solid black;
+    border-radius: 50%;
+    border-bottom-color: transparent;
+    border-left-color: transparent;
+    transform: rotate(-45deg);'
+    -ms-animation: uil-ring-anim 1s linear infinite;
+    -moz-animation: uil-ring-anim 1s linear infinite;
+    -webkit-animation: uil-ring-anim 1s linear infinite;
+    -o-animation: uil-ring-anim 1s linear infinite;
+    animation: uil-ring-anim 1s linear infinite;
+  }
+  h4 {
+    text-align: center;
+    font-family: sans-serif;
+    font-size: 2rem;
+  }
+  </style>
+</head>
+<body>
+  <h4>Loading..</h4>
+  <div class="uil-ring-css" >
+    <div></div>
+  </div>
+</body>
 </html>
