     <button class="btn btn-success" type="button">Success</button>
                            <button class="btn btn-warning" type="button">Warning</button>
                            <button class="btn btn-danger" type="button">Danger</button>
                            <button class="btn btn-dark" type="button">Dark</button>
                            <button class="btn btn-gray" type="button">Gray</button>
                            <button class="btn btn-light" type="button">Light</button>
       