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<!DOCTYPE html>
<html>
<head>
<style>
#grad1 {
  height: 150px;
  width: 200px;
  background-image: radial-gradient(red, yellow, green);
}
#grad2 {
  height: 150px;
  width: 200px;
  background-image: radial-gradient(circle, red, yellow, green);
}
</style>
</head>
<body>
<h1>Radial Gradient - Shapes</h1>
<p><strong>Ellipse (this is default):</strong></p>
<div id="grad1"></div>
<p><strong>Circle:</strong></p>
<div id="grad2"></div>
</body>
</html>