Let me see if I can re-phrase the question for everyone. Actually, ShuryuiCSI, you are close, but they need to be grouped into a particular 'type'. Velocity is blood spatter, but what does velocity mean? (hint: Project) that would be one 'group' of types of blood spatter. (Projected) There are 4 more 'types'. Does this help everyone? Sorry if it is confusing! I can do another question if everyone wants?