diff --git a/static/css/tutorial.css b/static/css/tutorial.css
new file mode 100644
index 0000000..fa7d07c
--- /dev/null
+++ b/static/css/tutorial.css
@@ -0,0 +1,6 @@
+#toto {
+    -webkit-transition: background-color 0.5s linear;
+    -moz-transition: background-color 0.5s linear;
+    -o-transition: background-color 0.5s linear;
+    transition: background-color 0.5s linear;
+}