modal.htlm

<div class="container" id="exampleModalCenter">
    <h2>Modal Example</h2>
    <!-- Trigger the modal with a button -->
    <button type="button" class="btn btn-info btn-lg" data-toggle="modal" data-target="#myModal">Open Modal</button>

    <!-- Modal -->
    <div class="modal fade" id="myModal" role="dialog">
      <div class="modal-dialog">

        <!-- Modal content-->
        <div class="modal-content">
            <div class="modal-header">
                  <button type="button" class="close" data-dismiss="modal">&times;</button>
                  <h4 class="modal-title">Modal Header</h4>
            </div>
            <div class="modal-body">
                      <p>Some text in the modal.</p>
            </div>
            <div class="modal-footer">
                     <button type="button" class="btn btn-default" data-dismiss="modal">Close</button>
            </div>
        </div>

      </div>
    </div>