ComfyFactorio/modules/splice_double.lua

-- biters splice into two -- by mewmew

local event = require 'utils.event'

local biter_fragmentation = {
		["medium-biter"] = "small-biter",
		["big-biter"] = "medium-biter",
		["behemoth-biter"] = "big-biter"
	}

local function on_entity_died(event)	
	if not event.entity.valid then return end
	if biter_fragmentation[event.entity.name] then
		local entity = event.entity
		for x = 1, 2, 1 do
			local p = entity.surface.find_non_colliding_position(biter_fragmentation[entity.name] , entity.position, 3, 0.5)
			if p then entity.surface.create_entity({name = biter_fragmentation[entity.name], position = p}) end
		end
		return
	end
end
	
event.add(defines.events.on_entity_died, on_entity_died)