If you program in assembler then you can find a sprite drawing routine in falclib6. If you are using STOS then you could hope that Anthony Jacques (jacquesa@cs.man.ac.uk) gets his Falcon STOS extension ready soon, because it supports true colour Spooky Sprites. The assembler sprite drawing program is written in position independent code and could easily be used in other languages like GFA-Basic with very small modifications.