Open a gui which closes the other gui? [closed]

So I have tween guis. I want to know how you make it so you open a gui but then you open another gui which close the one you first opened.

I have a button in the button is the tween script

local frame = script.Parent.Parent.Frame
local open = false

script.Parent.MouseButton1Down:connect(function()
    if open == false then
        frame:TweenPosition(UDim2.new(0.896, 0,-0.005, 0),'Out','Bounce',.5)
        open = true
    else
        frame:TweenPosition(UDim2.new(0.896, 160,-0.005, 0),'Out','Bounce',.5)
        open = false
    end
end)

Any ways to add on with the button to make it so open the first gui and open another gui which closes the first gui.