Roblox walkspeed anticheat

game.Players.PlayerAdded:Connect(function(plr)
    local anticheat = coroutine.create(function()
        plr.CharacterAdded:Connect(function(char)
            local HRP = char:WaitForChild("HumanoidRootPart")
            local lastpos
            wait()
            while wait(1) do
                if not lastpos then
                    lastpos = Vector3.new(HRP.CFrame.Position.X, 0, HRP.CFrame.Position.Z)
                else
                    local magnitude = math.round((lastpos - Vector3.new(HRP.CFrame.Position.X, 0, HRP.CFrame.Position.Z)).Magnitude)
                    lastpos = Vector3.new(HRP.CFrame.Position.X, 0, HRP.CFrame.Position.Z)
                    local limit = math.round(char.Humanoid.WalkSpeed + (char.Humanoid.WalkSpeed / 25))
                    if magnitude > limit then
                        plr:Kick("Imagine hacking to increase WalkSpeed...")
                    end
                end
            end
        end)
    end)

    coroutine.resume(anticheat)
end)