Trying to make a live destination board, and it won't display, am I doing anything wrong?

So I am helping make a train game, and one of the features are boards on the platform which say where the train is going. At terminus stations, I want to save the specific train (traintrigger) in an object value and then display it's destination, so when it changes its destination the board will also update. Currently the traintrigger is saved in the value correctly, but it won't show the destination on the board. The script I have is below.

value = script.Parent.Value
gui = script.Parent.SurfaceGui.TextBox

function touched(eeeee)
	if eeeee.Name == 'TRAINTRIGGER' then
		value.Value = eeeee
	end
end

script.Parent.Touched:Connect(touched)

while true do
	gui.Text = script.Parent.Value.Value.destination.Value
	wait()
end