How do i make a nother GUI with a other GUI change visibilty of a decal of the Nother gui?

I'm confused Please help?

function onClicked()
	game.Players.LocalPlayer.PlayerGui.AdminDecal.ImageID = "newid"
end

script.Parent.MouseButton1Down:connect(onClicked)

-A rough example of what your script should look like. "AdminDecal" is just what I called your admin decal GUI (Change it appropriately to what it is called). Also, ImageID might not be what its called - If its called something different, change that accordingly.