CSS Background Image property
HTML
<html>
<head>
<link rel="stylesheet" type="text/css" href="style.css">
</head>
<body>
<h4>Aliquam nec egestas lacus</h4>
<p>Aenean non odio a metus ultricies suscipit id non justo. Aliquam ac condimentum ex, non tincidunt dolor. Sed sem nibh, blandit volutpat pretium consectetur, convallis quis justo. </p>
</body>
</html>CSS
body{background-image: url(https://background-tiles.com/overview/yellow/patterns/large/1050.png);}