setup htaccess maintenace page as a 503 static html page

.htaccess

@@ -116,6 +116,9 @@ DirectoryIndex index.php index.html index.htm
   RewriteCond %{REQUEST_URI} !=/favicon.ico
   RewriteRule ^ index.php [L]
 
+  RewriteCond %{REMOTE_ADDR} !^82\.230\.62\.145
+  RewriteRule !503 http://www.materio.com/503 [R=503,L]
+
   # Rules to correctly serve gzip compressed CSS and JS files.
   # Requires both mod_rewrite and mod_headers to be enabled.
   <IfModule mod_headers.c>