<div class="alert alert-warning fade in">
  <button type="button" class="close" data-dismiss="alert" aria-hidden="true">×</button>
  <strong>Holy guacamole!</strong> Best check yo self, you're not looking too good.
</div>
<div class="alert alert-danger fade in">
  <button type="button" class="close" data-dismiss="alert" aria-hidden="true">×</button>
  <h4>Oh snap! You got an error!</h4>
  <p>Change this and that and try again. Duis mollis, est non commodo luctus, nisi erat porttitor ligula, eget lacinia odio sem nec elit. Cras mattis consectetur purus sit amet fermentum.</p>
  <p>
    <button type="button" class="btn btn-danger">Take this action</button>
    <button type="button" class="btn btn-default">Or do this</button>
  </p>
</div>