Are you the author or do you know the author? It would be nice to have a technical description of how it works (bonus points for a github repo with a permisive license). It looks like a nice initial proyect to make some "multiplayer"ineractive page.

Author is https://www.todepond.com (not me)

Here is the implementation: https://github.com/TodePond/TodePondDotCom/blob/main/wikiblo...