STR1X311

I´ve been trying for a week now to make a mod that adds blood pools under dead characters/npcs, and i can not for the life figure it out, i also tried to make a simple script to spawn a blood splatter under dead npcs but again to no luck so now i wonder if there is any experienced modders that can make this for me? a mod that spaws a big blood splatter/blood pool texture underneath killed npcs? thank you