SCP Script door error «Vector3 expected, got CFrame» how to fix?

I'm not really good in CFrame so can you help me for fix this?:/

15:25:48.386 - Workspace.Gate.Script:8: bad argument #2 to '?' (Vector3 expected, got CFrame)

deboulse = false

script.Parent.Button.ClickDetector.MouseClick:connect(function(player)
    if deboulse == false then
        deboulse = 2
        print(player.Name.." open door")
        for index, door in pairs(script.Parent.Parts:GetChildren()) do
            for i = 0,100 do
                door.CFrame = door.CFrame-CFrame.new(0,0,-4)
                wait()
            end
        end
        for index, light in pairs(script.Parent.lights:GetChildren()) do
            light.Color = BrickColor.new("Really red")
        end
        script.Parent.lights.BrickColor = BrickColor.new("Really red")
        deboulse = true
    elseif deboulse == true then
        deboulse = 2
        print(player.Name.." close door")
        for index, door in pairs(script.Parent.Parts:GetChildren()) do
            for i = 0,100 do
                door.CFrame = door.CFrame-CFrame.new(0,0,4)
                wait()
            end
        end
        for index, light in pairs(script.Parent.lights:GetChildren()) do
            light.Color = BrickColor.new("Institutional white")
        end
        script.Parent.lights.BrickColor = BrickColor.new("Institutional white")
        deboulse = false
    end
end)

Explorer: https://gyazo.com/ebc068f3ba1378368b4869dab81c79a6