CSS :nth-child() Selector
HTML Code
<!DOCTYPE html>
<html>
<head>
<style>
p:nth-child(2) {
background: red;
}
</style>
</head>
<body>
<p>The first paragraph.</p>
<p>The second paragraph.</p>
<p>The third paragraph.</p>
<p>The fourth paragraph.</p>
</body>
</html>
HTML View
The first paragraph.
The second paragraph.
The third paragraph.
The fourth paragraph.