This fun production called is a little 64 bytes effect (58 bytes+6 byte file header) for the Atari 800 XL (PAL). I created it on 2007-06-06 between 23:31:00 and 23:57:14. In case you are familiar with German, please don't be offended by the title but read the explanation below instead. In case you are not familiar with German: "Dieter and Giesela are fu..ing like wild animals in their neighbour's whirl pool".
I had just re-discovered that there is this strange web-site called Pouet which is dedicated to demo sceners. I found out that I even had an account there which was created many years ago. But ever since then I never had the time to look after demos or to even create one again. So browsing through all the latest releases there I found "Dieter und Gisela trinken Limonade und Hören Beat" by Camelot and the comment from "am-fm" on the 2007-06-01. When I read that comment I first had to laugh out loud and immediately started Ultraedit and ATASM just to be the first to occupy that cool title. Indeed my first production after many years, yep, thanks am-fm! The effect will start right away from any game DOS or emulator and will change every 5 seconds.
When loaded from a normal DOS, it might not start automatically depending on the DOS version. In this case, just run the code from address $4000, for example via "M" and "4000" under DOS 2.5 The reason is that there no explicit RUNADR segment. Otherwise only 64-6-6 = 52 bytes would be left for a 64 bytes production. Compared to 64-2 = 62 bytes on a C64 this would be quite a drawback. Here's the complete source of the only known release whose the executable requires less bytes than the title - which consists of 67 characters.