<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 ---------->
<script src="https://code.jquery.com/jquery-3.2.1.js" type="text/javascript"></script>
<!-- put the jquery in your header or footer -->
<div class="background">
<div class="form-group">
<label for="your-name">Name:</label>
<input type="text" name="your-name" id="your-name" value="" size="40" class="form-control">
</div>
</div>