Ever since my intimate involvement with Sweet Fanny Adams in Eden, Internet-only art has been one of my recurring interests. Most recently, I noted the delightful xkcd cartoon that only really works properly online, using features available in computers. Art that is not simply a recording of a performance that took place in some place and time. Art that is not simply a scan or representation of something that exists on a wall or street corner somewhere. Art that you cannot experience anywhere but on a connected device. Art that could not have been created before the twenty-first century.
Here are two more examples, both extremely simple, both aesthetically pleasing on the surface, and both with an added beauty because of the collaboration that is inherent in their creation.