<!DOCTYPE html>
<html>
<head>
<title>Learning jQuery</title>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.6.0/jquery.min.js"></script>
</head>
<body>
<button>Click to fade in circles</button>
<div id="first-div"></div>
<div id="second-div"></div>
</body>
</html>