>
    </div>
  </header>
  <section class="content">
    <section class="output" id="output">
      <!--TODO:meaningful output-->
      <h2>Example: ex1</h2>
      <canvas style="width:100%; height:100%; min-height:25em;" width="640" height="480" id="crow-canvas">
        Your browser doesn't appear to support the 
        <code>&lt;canvas&gt;</code> element.
      </canvas>
      <script type="text/javascript" src="./ex1.js"></script>
    </section>
    <section class="examplecode">
      <h2>Code</h2>
   