Im going to have to try it later on a color, AD is on only a b/w in front of me... BUT! I think this screensaver was an extension. I believe it was it's own extension because

1.) I had After Dark 2+3.0 on my mac at the time and don't recall seeing the same thing at home.

2.) I brought a floppy to school and while the teacher (112 year old grandma) wasn't looking, I copied the file to my floppy. Since long gone..