  </div>

    <!-- loading animation -->

    <div id="container"><div class="loader"></div></div>
    <div id="menu">
      <button id="table">TABLE</button>
      <button id="sphere">SPHERE</button>
      <button id="helix">HELIX</button>
      <button id="grid">GRID</button>
    </div>

    <!-- Import maps polyfill -->
    <!-- Remove this when import maps will be widely supported -->
    <script
      async
      src="https://unpkg.com/es-module-shims@1.3.6/dist/es-module-shims.js"></script>

    <scri