<!DOCTYPE html>
<html lang="en">
<head>
    <title>CSS Circle</title>
    <link rel="stylesheet" href="circle.css">
</head>
<body>
    <div class="container">
        <div class="circle"></div>
    </div>
</body>
  <footer>
    <p>Created by <a href="https://www.rembertdesigns.co/" target="_blank">Richard Rembert</a></p>
  </footer>
</html>
body{
    padding: 0;
    margin: 0;
}
.container{
    background-color: red;
    height: 100vh;
    width: 100vw;
    display: flex;
    align-items: center;
    justify-content: center;
}
.circle{
    background-color: white;
    height: 250px;
    width: 250px;
    border-radius: 50%;
}
footer {
    font-size: 16px;
    padding: 10px;
    text-align: center;
}
footer a {
  text-decoration: none;
  color: #536DFE;
}
footer a:hover {
  text-decoration: underline;
  color: #000
}

External CSS

This Pen doesn't use any external CSS resources.

External JavaScript

This Pen doesn't use any external JavaScript resources.