<!DOCTYPE html>
<meta charset="utf-8">
<title>A green 100x100 block</title>
<link rel="author" title="Xidorn Quan" href="me@upsuper.ort">
<link rel="author" title="Mozilla" href="https://www.mozilla.org">
<div style="width: 100px; height: 100px; background: green;"></div>