My script does nothing to a specific part, what did I do wrong?

(My coding knowledge is horrid, so apologies if I made a simple mistake)

I am creating a dialog box with options that provides a different outcome when a specific button is pressed. The way I get the old message to disappear and the new message to appear is through these scripts:

script.Parent.MouseButton1Click:Connect(function()
	script.Parent.Parent.Chat:Destroy()
	wait()
	script.Parent:Destroy()
end)

When I click the button, it destroys the old text box and the text button itself, but with my other script to get the new message to display:

script.Parent.MouseButton1Click:Connect(function()

local Text = "asdfasfsasa" 
for i = 1,#Text do
	script.Parent.Parent.Chat2.Text = string.sub(Text,1,i)
	wait(0.05)
end

I think it's supposed to activate when I press on the button as well, and then proceed to change the text of Chat2's text box, but it does not work.

How do I fix this? Thanks in advance.