popup.html

<!DOCTYPE html>
<html lang="en">

<head>

  <meta charset="UTF-8">
  <title>Blunder Watching</title>
  <meta name="viewport" content="width=device-width,initial-scale=1">
  <link rel="stylesheet" href="./popup.css" media="screen" />
  <style>

  </style>
  <script src="popup.js"></script>
</head>

<body>
  <main class="wrapper">
    <h1>Blunder Watching</h1>

    <h3>I am playing as</h3>
    <form id="radioForm" class="form">
      <label class="label">
        <input type="radio" name="option" value="white" id="white" class="input">White<br>
      </label>
      <label class="label">
        <input type="radio" name="option" value="black" id="black" class="input">Black<br>
      </label>
      <button id="sendMessageButton" class="button">Start Analyzing</button>
    </form>
  </main>
</body>

</html>