<html>
<head>
<style>
p::before {
content: "Read this -";
background-color: yellow;
color: red;
font-weight: bold;
}
</style>
</head>
<body>
<h1>Demo of ::before</h1>
<p>My name is Donald.</p>
<p>I live in Duckburg.</p>
</body>
</html>