local Player = game.Players.LocalPlayer
local Character = Player.Character or Player.CharacterAdded:Wait()
local Root = Character:WaitForChild("HumanoidRootPart")
local Neck = Character:FindFirstChild("Neck", true)
local Humanoid = Character:WaitForChild("Humanoid")

local YOffset = Neck.C0.Y
local XOffset = Neck.C0.X
local ZOffset = Neck.C0.Z

local CFNew = CFrame.new
local sin = math.sin
local clock = os.clock

-- Settings
local distance = 0.8 -- Distance of the move
local speed = 6   -- speed of the shake

game:GetService("RunService").RenderStepped:Connect(function()
	if not Neck then return end

	
	local sway = sin(clock() * speed) * distance

	if Humanoid.RigType == Enum.HumanoidRigType.R15 then
		Neck.C0 =
			CFNew(XOffset + sway, YOffset, ZOffset)

	elseif Humanoid.RigType == Enum.HumanoidRigType.R6 then
		Neck.C0 =
			CFNew(XOffset + sway, YOffset, ZOffset)
			* CFrame.Angles(3 * math.pi / 2, 0, math.pi)
	end
end)