Gui script not working?

TextButton = script.Parent

script.Parent.TextButton.MouseButton1Click:connect(function()
script.Parent.TextButton.Text  = "121"
end)

Text does not change when clicked

I think that you just made a simple mistake in not using the variable you defined. it should be like this:

TextButton = script.Parent

TextButton.MouseButton1Click:connect(function()
	TextButton.Text  = "121"
end)

Anyways, I hope this helped. If you have any further problems/questions, please leave a comment below :P

####-Dyler3