<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8"/>
<meta name="viewport" content="width=device-width, initial-scale=1.0"/>
<title>Counter</title>
<!-- styles -->
<link rel="stylesheet" href="styles.css">
</head>
<body>
<h1>your code goes here</h1>
<!-- javascript -->
<script src="app.js"></script>
</body>
</html>