This mimics the paper background of the Swiss site. The chat launcher is in the bottom-right corner — open it: it greets you bilingually, offers Čeština / English, then some quick starter questions.
The widget is loaded exactly the way you'd embed it on your real site:
<script src="/chat-widget.js" data-api=""></script>
— here data-api is empty, so it talks to this same origin.