Phat Beats Online! The Worst Drum Machine consist of a Java applet I wrote, three classic drum sounds and an intuitive step sequencer programmed in JavaScript — in not more than 5043 bytes (4.9 kilobytes).
Originally made for the 5k Web Design Award 2001. The competition was about creating the best possible web site in 5 kilobytes.
You can download the project as a ZIP archive (3955 bytes).
The 5k Awards do not exist anymore. I didn’t win, instead a 5k porn site reached the first place.