Index: gc_lang/fr/webext/content_scripts/menu.css
==================================================================
--- gc_lang/fr/webext/content_scripts/menu.css
+++ gc_lang/fr/webext/content_scripts/menu.css
@@ -3,24 +3,46 @@
     Menu for Grammalecte
 */
 
 .grammalecte_menu_main_button {
     position: absolute;
-    margin: -8px 0 0 -8px;
-    border: 4px solid hsla(210, 80%, 30%, .5);
-    border-radius: 12px;
-    background-color: hsla(210, 80%, 50%, .5);
-    width: 8px;
-    height: 8px;
+    margin: -10px 0 0 -10px;
+    width: 12px;
+    height: 12px;
+    background-color: hsla(210, 80%, 80%, .5);
+    border: 4px solid hsla(210, 80%, 60%, .5);
+    border-top: 4px solid hsla(210, 100%, 40%, .7);
+    border-bottom: 4px solid hsla(210, 100%, 40%, .7);
+    border-radius: 50%;
     text-align: center;
     cursor: pointer;
     z-index: 100000000;
+    animation: grammalecte-spin 4s ease infinite;
 }
 .grammalecte_menu_main_button:hover {
     border: 4px solid hsla(210, 80%, 35%, .5);
     background-color: hsla(210, 80%, 55%, .5);
     box-shadow: 0 0 10px hsla(210, 100%, 30%, .5);
+    animation: grammalecte-spin 1s linear infinite;
+}
+
+@keyframes grammalecte-spin {
+    0% {
+        transform: rotate(0deg);
+        border-top: 4px solid hsla(210, 100%, 40%, .7);
+        border-bottom: 4px solid hsla(210, 100%, 40%, .7);
+    }
+    50% {
+        transform: rotate(180deg);
+        border-top: 4px solid hsla(0, 100%, 40%, .7);
+        border-bottom: 4px solid hsla(0, 100%, 40%, .7);
+    }
+    100% {
+        transform: rotate(360deg);
+        border-top: 4px solid hsla(210, 100%, 40%, .7);
+        border-bottom: 4px solid hsla(210, 100%, 40%, .7);
+    }
 }
 
 .grammalecte_menu {
     display: none;
     position: absolute;