<div class="alert alert-primary" role="alert"> 
   This is a primary alert—check it out!
  <button type="button" class="close" data-dismiss="alert" aria-label="Close"> <span aria-hidden="true">×</span> </button>
</div>

<div class="alert alert-secondary" role="alert"> 
  This is a secondary alert—check it out!
  <button type="button" class="close" data-dismiss="alert" aria-label="Close"> <span aria-hidden="true">×</span> </button>
</div>

<div class="alert alert-success" role="alert"> 
  This is a success alert—check it out!
  <button type="button" class="close" data-dismiss="alert" aria-label="Close"> <span aria-hidden="true">×</span> </button>
</div>

<div class="alert alert-danger" role="alert"> 
  This is a danger alert—check it out!
  <button type="button" class="close" data-dismiss="alert" aria-label="Close"> <span aria-hidden="true">×</span> </button>
</div>

<div class="alert alert-warning" role="alert">
  This is a warning alert—check it out!
  <button type="button" class="close" data-dismiss="alert" aria-label="Close"> <span aria-hidden="true">×</span> </button>
</div>

<div class="alert alert-info" role="alert"> 
  This is a info alert—check it out!
  <button type="button" class="close" data-dismiss="alert" aria-label="Close"> <span aria-hidden="true">×</span> </button>
</div>

<div class="alert alert-light" role="alert"> 
  This is a light alert—check it out!
  <button type="button" class="close" data-dismiss="alert" aria-label="Close"> <span aria-hidden="true">×</span> </button>
</div>

<div class="alert alert-dark" role="alert"> 
  This is a dark alert—check it out!
  <button type="button" class="close" data-dismiss="alert" aria-label="Close"> <span aria-hidden="true">×</span> </button>
</div>