How do I make a GUI open another GUI? I am just asking to guide me. (Not through basic stuff.)

I am trying to make a Team Change GUI, One GUI for the name "Team Change" and opening the actual team change GUI. But it doesnt work. So I am trying to figure out how to do that.

local gui1 = SomeGui
local gui2 = SomeOtherGui

gui1.MouseButton1Click:connect(function() -- clicked

	gui2.Visible = true --making it visible!

end)

All you need to do is make the gui Visible, after having gui2 be invisible of course.