Whats wrong with this script?

repeat wait() until game.Players.LocalPlayer.Character 

game.Players.LocalPlayer.Character.Torso.Neck.MaxVelocity = 0.3

function turnheads()
    while true do
        wait()
        if game.Players.LocalPlayer.Character then
            if game.Workspace.CurrentCamera.CameraSubject == game.Players.LocalPlayer.Character:FindFirstChild("Humanoid") then
                camf = Vector3.new(game.Workspace.CurrentCamera.CoordinateFrame.X,game.Workspace.CurrentCamera.CoordinateFrame.Y,game.Workspace.CurrentCamera.CoordinateFrame.Z)    
                lv = game.Players.LocalPlayer.Character.Torso.CFrame.lookVector
                torsop = game.Players.LocalPlayer.Character.Head.Position
                game.Players.LocalPlayer.Character.Torso.Neck.DesiredAngle = -(((torsop - camf).Unit):Cross(lv)).Y
            end
        end
    end
end

turnheads()