Sadly, I think it was a partial false memory. There is indeed a section on making animated GIFs, but instead of a seal bouncing a ball, it's just a bouncing bal

Sadly, I think it was a partial false memory. There is indeed a section on making animated GIFs, but instead of a seal bouncing a ball, it's just a bouncing ball sans seal. Here's a screenshot from the book (it's on Archive.org) https://dl.sphericalcow.xyz/private/hn/0e66b5f993de9e96aaaee989bfb6f39e/animation_sams_teach_yourself_html.png https://dl.sphericalcow.xyz/private/hn/0e66b5f993de9e96aaaee...