diff --git a/TODO.md b/TODO.md
index 7372808..968b456 100644
--- a/TODO.md
+++ b/TODO.md
@@ -31,4 +31,5 @@ New Notes
 * [x] Minitest
 * [x] Formatter
   * [x] wrap warning containing \n
-  * [x] "\e[0;35mhello".length => 12 instead of 5!
\ No newline at end of file
+  * [x] "\e[0;35mhello".length => 12 instead of 5!
+  * [x] SQL compatible
\ No newline at end of file
diff --git a/app/views/layouts/_navbar.html.erb b/app/views/layouts/_navbar.html.erb
index f44599e..9956b43 100644
--- a/app/views/layouts/_navbar.html.erb
+++ b/app/views/layouts/_navbar.html.erb
@@ -9,4 +9,13 @@
     <li>C<i class="fa-regular fa-user"></i></li>
     <li>D<i class="fa-solid fa-user"></i></li>
   </ul>
+
+  <!-- solid style -->
+  <i class="fa-solid fa-user"></i>
+
+  <!-- regular style -->
+  <i class="fa-regular fa-user"></i>
+
+  <!--brand icon-->
+  <i class="fa-brands fa-github-square"></i>
 </nav>