diff --git a/week7/Assignment1/main.css b/week7/Assignment1/main.css
index f42c3c6..17235b3 100644
--- a/week7/Assignment1/main.css
+++ b/week7/Assignment1/main.css
@@ -8,7 +8,8 @@
     background-color: #DDD;
     float: left;
     padding: 10px 0px;
-    margin:15px 0px 15px 15px;
+    margin-top:15px;
+    margin-left:15px;
 }
 .full-width{
     width: calc(100% - 2*15px) ;
@@ -21,8 +22,9 @@
 }
 .one-forth{
     width:calc((100% - 15px *5)/4);
+    margin-bottom:15px;
 }
 .clear{
     display: block;
     clear: both;
-}
\ No newline at end of file
+}