doctype html html lang en head meta charset UTF-8 title Document title

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<!doctype html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Document</title>
<link rel="stylesheet" href="style.css">
</head>
<body>
<div id="main">
<div class="bubble"></div>
<div class="bubble2"></div>
</div>
</body>
</html>