diff --git a/kallithea/public/css/style.css b/kallithea/public/css/style.css
--- a/kallithea/public/css/style.css
+++ b/kallithea/public/css/style.css
@@ -2796,6 +2796,40 @@ input.status_change_radio {
     border-radius: 4px !important;
 }
 
+@keyframes animated-comment-background {
+    0% { background-position: 0 0; }
+    100% { background-position: 20px 0; }
+}
+
+.comment-preview.failed .user,
+.comment-preview.failed .panel-body {
+    color: #666;
+}
+
+.comment-preview .comment-submission-status {
+    float: right;
+}
+
+.comment-preview .comment-submission-status .btn-group {
+    margin-left: 10px;
+}
+
+.comment-preview.submitting .panel-body {
+    background-image: linear-gradient(
+        -45deg,
+        #FAFAFA,
+        #FAFAFA 25%,
+        #FFF 25%,
+        #FFF 50%,
+        #FAFAFA 50%,
+        #FAFAFA 75%,
+        #FFF 75%,
+        #FFF 100%
+    );
+    background-size: 20px 20px;
+    animation: animated-comment-background 0.4s linear infinite;
+}
+
 /****
 PULL REQUESTS
 *****/