<!DOCTYPE html>
<html>
<head>
<title>Title of the document</title>
<style>
li:nth-child(odd) {
background: #74d686;
font-size: 24px;
color: #ffffff;
}
li:nth-child(even) {
background: #d6d6d6;
font-size: 20px;
color: #666;
}
</style>
</head>
<body>
<ul>
<li>Lorem Ipsum</li>
<li>Some text</li>
<li>Lorem Ipsum</li>
<li>Some text</li>
</ul>
</body>
</html>