--------------------------------------------------
-- SERVICES
--------------------------------------------------
local Zombies = workspace:WaitForChild("Zombies")

--------------------------------------------------
-- CONFIG
--------------------------------------------------
local HEAD_SCALE = 4.5
local TRANSPARENCY = 0.8

--------------------------------------------------
-- STORAGE
--------------------------------------------------
local processed = setmetatable({}, {__mode = "k"})

--------------------------------------------------
-- APPLY BIG HEAD
--------------------------------------------------
local function applyBigHead(zombie)

    if processed[zombie] then return end
    processed[zombie] = true

    local head = zombie:FindFirstChild("Head")
    if not head then return end

    head.Size = Vector3.new(HEAD_SCALE, HEAD_SCALE, HEAD_SCALE)
    head.Transparency = TRANSPARENCY
    head.CanCollide = false
end

--------------------------------------------------
-- EXISTING ZOMBIES
--------------------------------------------------
for _, zombie in ipairs(Zombies:GetChildren()) do
    applyBigHead(zombie)
end

--------------------------------------------------
-- NEW SPAWNED ZOMBIES
--------------------------------------------------
Zombies.ChildAdded:Connect(function(zombie)
    task.wait(0.1)
    applyBigHead(zombie)
end)

print("[ZombieBigHead] Optimized - No constant checks")