<link href="//netdna.bootstrapcdn.com/bootstrap/3.0.0/css/bootstrap.min.css" rel="stylesheet" id="bootstrap-css">
<script src="//netdna.bootstrapcdn.com/bootstrap/3.0.0/js/bootstrap.min.js"></script>
<script src="//code.jquery.com/jquery-1.11.1.min.js"></script>
<!DOCTYPE html>
<html lang="en">
<head>
<title>Bootstrap Example</title>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css">
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js"></script>
</head>
<body>
<div class="container-fluid">
<h1>Bootstrap Grid System</h1>
<p>The columns will automatically stack on top of each other when the screen is less than 768px wide.</p>
<div class="row">
<div class="col-sm-4" style="background-color:lavender;">Column 1</div>
<div class="col-sm-4" style="background-color:lavenderblush;">Column 2</div>
<div class="col-sm-4" style="background-color:lavender;">Column 3</div>
</div>
<br>
<div class="row">
<div class="col-xs-4" style="background-color:pink;">Column 1</div>
<div class="col-xs-8" style="background-color:skyblue;">Column 2</div>
</div>
</div>
</body>
</html>
