simple website using html and css
<!-- index.html -->
<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<title>Page Title Goes Here</title>
<meta name="description" content="Description Goes Here">
<link rel="stylesheet" href="style.css">
</head>
<body>
<div class="red-box"></div>
<style type="text/css">
.red-box {
width: 30px;
height: 30px;
background-color: red;
}
</style>
</body>
</html>