White Lightning for ZX Spectrum 48K by Oasis Software White Lightning by Oasis Software for the 48K ZX Spectrum. This two cassette suite of software is a forth based programming language geared towards writing high speed arcade games on the ZX Spectrum. The White Lightning Language features: Over 80 graphic manipulation commands Allows forth/Basic hybrid programmes to be written Features interrupt driven routines executing 50 times per second 255 sprites The pack includes: video style box Two cassettes 136 page manual