diff --git a/12/style.css b/12/style.css
index cb56785..194ad3e 100644
--- a/12/style.css
+++ b/12/style.css
@@ -35,6 +35,10 @@ body{
 
 .week_01{
   margin:40px;
+  border-style:dotted none dotted none;
+  border-width:2px;
+  border-color: blue;
+  margin-top:30px;
 }
 
 .audio{