diff --git a/12/shell.html b/12/shell.html
index 4204ddb..e142956 100644
--- a/12/shell.html
+++ b/12/shell.html
@@ -5,16 +5,19 @@
     <title>shell</title>
 <style>
 body {
-    background: #888;
+    background: blue;
 }
 body.connected {
     background: none;
 }
 #shell {
     white-space: pre-wrap;
-    height: 100%;
-    width: 100%;
-
+    position: absolute;
+  	left: 0px;
+  	right: 0px;
+  	top: 0px;
+  	bottom: 0px;
+  
     font-family: monospace;
     color: white;
     font-size: 14px;