<!DOCTYPE html>
<html>
<head>
<title> Title of the document</title>
<style>
.gradient1 {
height: 150px;
width: 200px;
background-color: blue;
background-image: radial-gradient(red, yellow, green);
}
.gradient2 {
height: 150px;
width: 200px;
background-color: blue;
background-image: radial-gradient(circle, red, yellow, green);
}
</style>
</head>
<body>
<h2>Ellipse:</h2>
<div class="gradient1"></div>
<h2>Circle:</h2>
<div class="gradient2"></div>
</body>
</html>