I wanted to brighten the day of a good friend who lives far away, so I threw together this light-hearted file.
I thought it might be fun to share here. I hope it brings someone a laugh or a smile.
The custom function comes from a rainy day in early 2017, when I sat down to learn a bit about CSS animations. (A year later, of course, one sees many possibilities for improvement. )
I haven't done anything to make this multi-platform. As far as I know, it only works well on Mac OS.