You don't have to follow my rules, they're meant as a challenge because building a DRAY/CRAY bomb that just deletes everything and copies itself in its place isn't very difficult id:2865942. Something like this id:3011604 obeys the 5 rules and is much harder to get right (mainly by tuning the CRAYs tmp2).
thanks for your suggestion
Pretty nice +1, but DMND in a DRAY/CRAY bomb almost inevitably leads to a screen filled with lots of DMND. My personal rules of thumb for a good DRAY/CRAY bomb: 1) It fills the screen in a single frame. 2) It doesn't reach the particle limit. 3) It doesn't go on forever but eventually stops after it has destroyed its target. 4) It leaves the least debris possible and ends with an almost empty screen. 5) It's small, preferably less than 150 particles in size.