This is a simple scripting language for implementing particle system graphics effects. It was obviously written by Shawn Hargreaves in September 1998, and updated in June 1999 to work under Windows using MSVC, and updated again July 1999 to work under Linux.
See more here.
July 2015: As the program is freeware, I (René) decided to put it on github.
It obviously needs allegro.h.
The Graphic, Design and Font repository.