<!doctype html>
<html lang="en">
  <head>
    <style type="text/css">
      body {
        overflow: hidden;
      }
      textarea {
        width: 100%;
        height: 100%;
        position: absolute;
        top: 0;
        left: 0;
        resize: none;
        color: #fff;
        background-color: #222;
        font-size: 14px;
        font-family:
          Courier New,
          Courier,
          Lucida Sans Typewriter,
          Lucida Typewriter,
          monospace;
        box-sizing: border-