Yes, a moving square, from a couple lines of code, that can be easily changed to a twirly throbbing square, and can be shown on anyone's computer or mobile phon

Yes, a moving square, from a couple lines of code, that can be easily changed to a twirly throbbing square, and can be shown on anyone's computer or mobile phone in the world by sharing a URL. To get a moving square on the desktop twenty years ago took more lines of code, arguably harder to change to a twirly throbbing square, and usually copied to disk (or emailed) to show someone else by sharing the executable that may or may not run.