add b4

Signed-off-by: Christopher Guindon <chris.guindon@eclipse.org>

index.php

diff --git a/index.php b/index.php
index 915271d..bcbbed2 100644
--- a/index.php
+++ b/index.php
@@ -43,6 +43,9 @@
 	elseif ($banner == 3) {
     $home_well_classes = 'b3';
 	}
+	elseif ($banner == 4) {
+    $home_well_classes = 'b4';
+	}
 
 	// Place your html content in a file called content/en_pagename.php
 	ob_start();