You're anonymous, but everyone can see your cursor.
You can type a message by pressing /
Everyone will see what you type.
Press escape
to close your message box
It might even work on your site:
<script src="https://presence.logs.pm/presence.js" onload="_showPresence()"></script>
(It works like mine: Jamesfuthey.com)
GitHub: kidGodzilla/live-presence