se" href="../bubble.html"
          >Bubbleplot section</a
        >
        <button
          class="btn btn-secondary btn-md text-uppercase"
          onclick="myCodeDownload('chart_example_from_d3-graph-gallery.html', 'code-html-v4', 'code-js-v4')"
        >
          Download code
        </button>
      </div>
    </header>

    <section class="bg" style="padding-top: 20px; padding-bottom: 20px">
      <div class="container">
        <div class="row">
          <!-- ==================== GRAPH SECTION =