How do I make a brick that opens up a gui once touched?

I tried making a script that opened a gui once touched but it doesn't work? What did I do wrong?

function ontouched(part)
	script.Parent.Parent.Parent.StarterGui.ScreenGui.ImageLabel.Visible = true

script.Parent.Parent.Touched:connect(onTouch) 
end

The problem is because you typed the wrong function. Here I fix it for you:

-- in local script
function onTouch()
	script.Parent.Parent.Parent.StarterGui.ScreenGui.ImageLabel.Visible = true
	print('Touched!')
script.Parent.Parent.Touched:connect(onTouch) 

But, I recommend you write like this:

-- in local script
script.Parent.Parent.Touched:connect(function()
	script.Parent.Parent.Parent.StarterGui.ScreenGui.ImageLabel.Visible = true
	print('Touched!')
end)

Because the second one is easier to type.

You have a couple of problems:

1. You are using StarterGui. You need to use PlayerGui on the person that pressed. Consider the example below.

2. You are connecting the function inside it's self. Don't do that!

function ontouched(part)
local plr =game.Players:GetPlayerFromCharacter(part.Parent)
if plr then
plr.PlayerGui.ScreenGui.ImageLabel.Visible = true
end

end
script.Parent.Parent.Touched:Connect(ontouched)