f3x head shake

local RunService = game:GetService("RunService")
local Player = game.Players.LocalPlayer
local char = Player.Character or Player.CharacterAdded:Wait()
local head = char:WaitForChild("Head")
local headMesh = head:FindFirstChildWhichIsA("SpecialMesh")

local tool = Player:FindFirstChild("SyncAPI", true) or game.ReplicatedStorage:FindFirstChild("SyncAPI", true)
if not tool then return end
local server = tool.Parent.SyncAPI.ServerEndpoint

local myHats = {}
for _, thing in ipairs(char:GetChildren()) do
    if thing:IsA("Accessory") and thing:FindFirstChild("Handle") then
        local mesh = thing.Handle:FindFirstChildWhichIsA("SpecialMesh")
        if mesh then
            table.insert(myHats, {
                part = thing.Handle,
                mesh = mesh.MeshId
            })
        end
    end
end

local time = 1
local off = 1
local target = 0
local smooth = 14
local acc = 0
local rate = 1/60

_G.ShakeSistemi = true

RunService.RenderStepped:Connect(function(dt)
    if not _G.ShakeSistemi then return end
    
    time = time + dt * 10 
    target = math.sin(time) * 0.7
    off = off + (target - off) * dt * smooth
    
    acc = acc + dt
    if acc >= rate then
        acc = 0
        
        local stuff = {
            {
                Part = head,
                MeshId = headMesh.MeshId,
                Offset = Vector3.new(off, 0, 0)
            }
        }
        
        for _, hat in ipairs(myHats) do
            table.insert(stuff, {
                Part = hat.part,
                MeshId = hat.mesh,
                Offset = Vector3.new(off, 0, 0)
            })
        end
        
        server:InvokeServer("SyncMesh", stuff)
    end
end)