How can I make a GUI fade instead of fading out?

Hi. I recently got a script to make a GUI fade out. It works very well, however I would also want the GUI to fade in. Basically the opposite of what this script does. How can I make that happen? Thanks.

wait(5)

local frame = script.Parent

wait(12.5)

for i = 1,100 do frame.BackgroundTransparency += 0.01 wait(0.001) end

You can make the frame transparent by default, and then make it's transparency slowly lower like this:

local frame = script.parent
frame.Transparency = 1

wait(12.5)

for i = 1,100 do
	frame.BackgroundTransparency = frame.BackgroundTransparency - 0.01
end