put the following code on your webpage where you want the widget to appear: 

        
<div id="theNEXUS">
    <script type="text/javascript" src="https://nexus.fantasydragon.xyz/onionring-variables.js"></script>
    <script type="text/javascript" src="https://nexus.fantasydragon.xyz/onionring-widget.js"></script>
</div>
you might also want to include this: 
<link rel="stylesheet" href="https://nexus.fantasydragon.xyz/onionring.css">
in the <head></head> part of their page to apply some basic styling to the widget.

once you've done that, you should see a message telling you to talk to FantasyDragon, which you can do via various methods here

Code source: Onionring