Lua Skull System, count all kills script help

[Ghazer]

Hello I need skull system but count all players killed not only last kill or injustifed, please help!


This is my actual script (I dont test this script I find in search and edit a little)

local storage = 9000
 
function onKill(cid, target, lastHit)
	if isPlayer(target) and cid ~= target then
		local frags = math.max(0, getCreatureStorage(cid, storage)) + 1
		setPlayerStorageValue(cid, storage, frags)
			if frags >= 10 and frags < 100 then
		    doCreatureSetSkullType(cid, SKULL_YELLOW)
	    elseif frags >= 100 and frags < 200 then 
		    doCreatureSetSkullType(cid, SKULL_GREEN)
	    elseif frags >= 200 and frags < 500 then
		    doCreatureSetSkullType(cid, SKULL_WHITE)
	    elseif frags >= 500 and frags < 800 then
		    doCreatureSetSkullType(cid, SKULL_RED)
	    elseif frags > 800 then
		    doCreatureSetSkullType(cid, SKULL_BLACK)
	    end
	end
	return true
end