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<!DOCTYPE html>
<html>
<head>
<style>
#grad1 {
  height: 200px;
  width: 200px;
  background-image: repeating-radial-gradient(ellipse farthest-corner at 25% 25%, red, yellow 10%, green 15%);
}
</style>
</head>
<body>
<h1>Repeating Radial Gradient</h1>
<div id="grad1"></div>
</body>
</html>