My Textbutton GUI isn't changing text or transparency?

Hey everyone, I'm trying to make the text in my textbutton gui change transparency and change the message, but the script I wrote isn't working at all. I have no idea what is going wrong and it seems like it should work, but it isn't... any reason why? Script:

local textbox = script.Parent

wait(5)

for i = 1,10 do 
	wait(0.1)
	textbox.TextTransparency = textbox.TextTransparency + 0.1
end
textbox.Text = "(new text)"
for i = 1,10 do
	wait(0.1)
	textbox.TextTransparency = textbox.TextTransparency - 0.1
end
wait(5)

reads a few lines and finds the error. TextTransparency isn't a valid property of Text UI Objects. remove the word text and your issue is solved.

local textbox = script.Parent

wait(5)

for i = 1, 10 do 
    wait(0.1)
    textbox.Transparency = textbox.Transparency + 0.1
end
textbox.Text = "(new text)"
for i = 1, 10 do
    wait(0.1)
    textbox.Transparency = textbox.Transparency - 0.1
end

wait(5)

Unless, your trying to connect to another text child inside explorer, this should work.