<html>
<head>
<style>
.grey-element{
background-color: lightgrey;}
</style>
</head>
<body>
<ol>
TO DO:
<li class="grey-element">Floss</li>
<li>Feed Cat</li>
<li class="grey-element">Nap</li>
<li>Plan holiday</li>
<li class="grey-element">Order tea</li>
</ol>
</body>
</html>]]>Make sure to assemble class = "grey-element"
.