How do I make a screenGui pop up on click?

I know it has something to do with cloning to to the StarterGui, but I don't know how. Any help would be appreciated. Here is the start of the script.

function show()

	end 

script.Parent.ClickDetector.MouseClick:connect(show)

function show()
plr:WaitForChild("PlayerGui").ScreenGui.Frame.Visible = true
end

script.Parent.ClickDetector.MouseClick:connect(function(plr)
show()
end)

You where correct with the function, So to continue on that we need to clone the gui into the players Playergui

function FindClosestPlayer()
dist = 20
pl = ""
	for i,v in pairs(game.Players:GetPlayers()) do
		if v.Character ~= nil then
			if (v.Character.Torso.Position - script.Parent.Position).magnitude < dist then
				dist = (v.Character.Torso.Position - script.Parent.Position).magnitude
				pl = v.Name
			end
		end
	end
	if pl ~= "" then
		return pl
	end
end

function onClicked()
    for i,v in pairs(script:GetChildren()) do
		if v:IsA("ScreenGui") then
			cl = v:clone()
			pl = FindClosestPlayer()
			if game.Players:FindFirstChild(pl) ~= nil then
				if game.Players:FindFirstChild(pl).PlayerGui:FindFirstChild(v.Name) == nil then
					cl.Parent = game.Players:FindFirstChild(pl).PlayerGui
					game.Players:FindFirstChild(pl).Character.Humanoid.WalkSpeed = 0
				end
			end
		end
	end
end
 
script.Parent.ClickDetector.MouseClick:connect(onClicked)

Gui must be in the script, and script in the part.

Hope this helps

Just do this:

function Clicked() game.StarterGui.ScreenGui.Frame.Visible = true end script.Parent.MouseButton1Down:connect(Clicked)

-- This is just a basic way of trying to make a Gui show up. If you want to get advanced you would use a loop.