l-2 btn-secondary" href="#"> Button</a> </div>
    </div>
  </nav>
  <nav class="navbar navbar-expand-md navbar-dark bg-secondary my-3">
    <div class="container"> <a class="navbar-brand" href="#"><b>Navbar Secondary</b></a> <button class="navbar-toggler navbar-toggler-right" type="button" data-toggle="collapse" data-target="#navbarSecondarySupportedContent" aria-controls="navbar2SupportedContent" aria-expanded="false"
        aria-label="Toggle navigation">
      <span class="navbar-toggler-icon"></span> 