Example :
To Select all elements, and set their background color to yellow.
<!-- To Select all elements, and set their background color to yellow. -->
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Universal Selector</title>
<style>
* {
background-color: yellow;
color: red;
}
</style>
</head>
<body>
<h1>Welcome to CSS Webpage </h1>
<center>By Vikram Sharma G <br>
I live in UP.</center>
<p>So, We are gaining knowledge.</p>
</body>
</html>OUTPUT
