./css/plugins/fullscreen.css">
  <link rel="stylesheet" href="../../css/plugins/file.css">
  <link rel="stylesheet" href="../../css/plugins/quick_insert.css">
  <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/codemirror/5.3.0/codemirror.min.css">

  <style>
    body {
      text-align: center;
    }

    div#editor {
      width: 81%;
      margin: auto;
      text-align: left;
    }

    .class1 {
      border-radius: 10%;
      border: 2px solid #efefef;
    }

    .class2 {
      opac