Can you script an Opening a GUI from a StarterGui?

Hi, I am not quite sure about this script. But it just not working, I tried testing this as a local script and tested in-game and in test server. Still couldn't work!

Can you figure this script out?

function lighting()
local Control = game:GetService("StarterGui").WorkingOnGui.CeilingLightControl.Visible = true
end

script.Parent.MouseButton1Down:connect(lighting)

I know that I have tried tweaking the script by myself, but what I have tweaked is below.

function lighting()
game:GetService("StarterGui").WorkingOnGui.CeilingLightControl.Visible = true -- The difference between the old and the new script is that I have taken out "local Control = ".
end

script.Parent.MouseButton1Down:connect(lighting)

But the script didn't work, so what I did is that I tried it as an Local Script - but that didn't work either!

Is there any other solutions?

Thanks!