<!DOCTYPE html>
<html>
<head>
<title>Title of the document</title>
<style>
.square {
background: url("https://images.unsplash.com/photo-1546146830-2cca9512c68e?ixlib=rb-1.2.1&ixid=eyJhcHBfaWQiOjEyMDd9&auto=format&fit=crop&w=500&q=60") 50% 50% no-repeat;
width: 300px;
height: 300px;
}
.square a {
display: block;
width: 300px;
height: 300px;
}
</style>
</head>
<body>
<div class="square">
<a href="https://www.w3docs.com/">W3Docs</a>
</div>
</body>
</html>