Hay i made this because my modpack is using a mod called First Aid Mod and I notice that right now that no matter the health is the blood spawn on the ground. The First Aid Mod replace Minecraft Health System and replace it with body parts and The Head and Body is critical body part which mean if any of them hit 0 you die.

First Aid dose have an API to work with.

First Aid: https://minecraft.curseforge.com/projects/first-aid?gameCategorySlug=mc-mods&projectID=276837

My Modpack: https://minecraft.curseforge.com/projects/real-life-modpack?gameCategorySlug=modpacks&projectID=255693