[SOLVED] Pop-up GUI whilst touching brick?

I am having trouble making a GUI pop up when the player is touching a part, but then the GUI disappears when the player is not touching the part.

The part that I want the player to touch and activate the GUI is called 'Part'. The GUI is called 'GUI'.

The tree goes like this, Workspace > Part > Script > GUI

This is the code I have so far:

script.Parent.Touched:connect(function(char)
    local player = game.Players:GetPlayerFromCharacter(char)
    if player and not player.PlayerGui.GUI then
        script.GUI:clone().Parent = player.PlayerGui
    end
end)

script.Parent.TouchEnded:connect(function(char)
    local player = game.Players:GetPlayerFromCharacter(char)
    if player and player.PlayerGui.GUI then
        player.PlayerGui.GUI:Destroy()
    end
end)

When I test, the GUI just doesn't come up on screen when I touch the part.

How do I fix this??