JSFiddle - React, Tailwind, and code Playground

HTML

<!-- Bootstrap -->
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.5/css/bootstrap.min.css">
<body>
    <div class="container">
        <div class="row">
            <div class="col-md-4">
                <div class="content">a</div>
            </div>
            <div class="col-md-4">
                <div class="content">a</div>
            </div>
            <div class="col-md-4">
                <div class="content">a</div>
            </div>
        </div>
        <div class="row">
            <div class="col-md-4">
                <div class="content">a</div>
            </div>
            <div class="col-md-8">
                <div class="row">
                    <div class="col-md-12">
                        <div class="content">a</div>
                    </div>
                </div>
                <div class="row">
                    <div class="col-md-6">
                        <div class="content">a</div>
                    </div>
                    <div class="col-md-6">
                        <div class="content">a</div>
                    </div>
                </div>
            </div>
        </div>
        <div class="row"></div>
    </div>
    <!-- jQuery (necessary for Bootstrap's JavaScript plugins) -->
    <script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.3/jquery.min.js"></script>
</body>

</html>

CSS

.content {
            background-color: grey;
            margin: 25px;
        }