<!doctype html>
<html>
<head>
<style>
/* At least 4 pair of <p> above, can be overlapping. The other selectors of the list are useless. */
p:nth-child(4n of html:root>body>p+p:not(empty), :not(*), p:not(p), span, .notthere) {
    background-color: lime;
}
</style>
</head>
<body>
    <p>This test the styling of paragraphs with :nth-child(An+B of selector). If the test succeed, paragraphs that say "green" should have a green background.</p>
    <p>White</p>
    <p>White</p>
    <p>White</p>
    <p>Green</p>
    <p>White</p>
    <p>White</p>
    <p>White</p>
    <p>Green</p>
</body>
</html>