CodeMirror-selected  { background-color: blue !important; }
      .CodeMirror-selectedtext { color: white; }
    </style>
  </head>
  <body>
    <h1>CodeMirror: Mark Selection Demo</h1>

    <form><textarea id="code" name="code">Select something from here.
You'll see that the selection's foreground color changes to white!
Since, by default, CodeMirror only puts an independent "marker" layer
behind the text, you'll need something like this to change its colour.</textarea></form>

    <script>
var editor = Co