I remember this from the era when building websites with FrontPage and DreamWeaver was still a thing. There were sites with catalogs of those "apply cool effects to your website by copy-paste this snippet to your HTML source file", and a clock following the mouse cursor is definitely one of them! Fun times.
I had a GeoCities page and really wanted to try the cursor effects/followers, but they never seemed to work. I kept trying to add them and never saw anything... until I looked at the site on a friend's computer in IE and the screen just exploded with cursor followers. I was primarily a Netscape/Firefox user and didn't consider that my browser might not support the effects!
