head movement

local Camera = workspace.CurrentCamera
local Player = game.Players.LocalPlayer

local Character = Player.Character
local Root = Character:WaitForChild("HumanoidRootPart")
local Neck = Character:FindFirstChild("Neck", true)
local YOffset = Neck.C0.Y

local CFNew, CFAng = CFrame.new, CFrame.Angles
local asin = math.asin

game:GetService("RunService").RenderStepped:Connect(function()
    local CameraDirection = Root.CFrame:toObjectSpace(Camera.CFrame).lookVector
    if Neck then
		if Character.Humanoid.RigType == Enum.HumanoidRigType.R15 then
        	Neck.C0 = CFNew(0, YOffset, 0) * CFAng(0, -asin(CameraDirection.x), 0) * CFAng(asin(CameraDirection.y), 0, 0)
		elseif Character.Humanoid.RigType == .HumanoidRigType.R6 
			Neck.C0 = (, YOffset, ) * ( * .pi/, , .pi) * (, , -(CameraDirection.x)) * (-(CameraDirection.y), , )
		
    
)