ton></a>
            </li>
            <li>
              <a href="#" id="mergeSort"><button>Merge Sort (X)</button></a>
            </li>
          </ul>
        </li>
        <li class="has-children">
          <button>Speed <i class="arrow"></i></button>
          <ul class="children">
            <li>
              <a href="#" id="fast"><button>Fast</button></a>
            </li>
            <li>
              <a href="#" id="default-speed"><button>Normal</button></a>
            </li>
            <li>
