Replacement for Water Line?

Has anyone found a replacement for the Water Line activity?
Is converting the activity over to the newer Desmos platform a possibility? Has anyone done this work?

I am aware of the suggested Functions collection (
but I particularly like the animation and concrete context of Water Line, so I am particularly interested in whether there is a direct replacement (converted from the original in some way?).

I saw that Function Carnival is being worked on
(this thread:
but I hadn’t heard about Water Line.

Thanks in advance.