<link href="//maxcdn.bootstrapcdn.com/bootstrap/4.1.1/css/bootstrap.min.css" rel="stylesheet" id="bootstrap-css"> <script src="//maxcdn.bootstrapcdn.com/bootstrap/4.1.1/js/bootstrap.min.js"></script> <script src="//cdnjs.cloudflare.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script> <!------ Include the above in your HEAD tag ----------> <div class="container"> <div class="row row-cols-2"> <div class="col bl">1</div> <div class="col gre">2</div> <div class="col bl">3</div> <div class="col red">4</div> </div> </div>

.gree{ background:green; } .gre{background: #ddd} .bl{ background: #987; } .red{ background:red }