 a
                    <code>div</code> that will be modified by d3 later on.
                  </li>
                  <br />
                  <li>
                    The first part of the javascript code set a
                    <code>svg</code> area. It specify the chart size and its
                    margin. <a href="">Read more</a>.
                  </li>
                  <br />
                  <li>
                    The <code>d3.stack()</code> function is used to stack the
                 