<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=".stage">
<div class=".stage-content"></div>
<label class=".curtain-container">
<div class=".curtain-panel">
<input type=".checkbox" class="curtain-trigger" />
<div class=".left-curtain curtain" data-title="Click to reveal a special reward..."></div>
<div class=".right-curtain curtain" data-title="Click to reveal a special reward..."></div>
</div>
</label>
</div>
