How to have another GUI open as soon as another is closed?

This is the code I have right now,

function onClicked()
	script.Parent.Parent.Visible = false
end
script.Parent.MouseButton1Click:connect(onClicked)

That is the code that will make the current GUI turn invisible when you press down on the "Play" option anyway , my question is would I have to add a "then" into the script to have the other GUI who is also a Child of the Frame to somehow turn visible when you press the "Play" textbutton?