client.html

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>r/Place Türkiye WEB istemcisi</title>
  <link rel="stylesheet" href="style.css">
  <link rel="shortcut icon" href="https://avatars.githubusercontent.com/u/140610717?s=200&v=4" type="image/x-icon">
  <style>
    html, body {
      position: absolute;
      height: 100%;
      max-height: 100%;
      width: 100%;
      margin: 0;
      padding: 0;
    }
    iframe {
      position: absolute;
      height: 100%;
      width: 100%;
      border: none;
    }
  </style>
</head>
<body class="dark">
    <button class="close">X</button>
    <iframe src="https://script.google.com/macros/s/AKfycbxR0qhY0NunjH2IylAikKkWdFNLatWFUNeEfKLmCm773gOGo5aDFD8sZvBmA8eJa_-6nw/exec" width="100%" height="100%">
        <b>Eğer bu yazıyı görüyorsanız tarayıcınız istemcimizi desteklemiyor demektir.</b>
    </iframe>
  <script>
    document.querySelector(".close").onclick = function () {
        window.location.href = "index.html";
    }
  </script>
</body>
</html>