How can I make a ImageButton smoothly flicker?

I want a light to smoothly flicker, what I mean is when I want the transparency to go up, it scrolls across all the numbers going up, and when the transparency is at 1, it scrolls down.

My code works, but it's really long.

while true do
	-- out
	wait(0.01)
	script.Parent.ImageTransparency = .1
	wait(0.01)
	script.Parent.ImageTransparency = .2
	wait(0.01)
	script.Parent.ImageTransparency = .3
	wait(0.01)
	script.Parent.ImageTransparency = .4
	wait(0.01)
	script.Parent.ImageTransparency = .5
	wait(0.01)
	script.Parent.ImageTransparency = .6
	wait(0.01)
	script.Parent.ImageTransparency = .7
	wait(0.01)
	script.Parent.ImageTransparency = .8
	wait(0.01)
	script.Parent.ImageTransparency = .9
	wait(0.01)
	script.Parent.ImageTransparency = 1
	wait(0.01)
	-- in
	script.Parent.ImageTransparency = .9
	wait(0.01)
	script.Parent.ImageTransparency = .8
	wait(0.01)
	script.Parent.ImageTransparency = .7
	wait(0.01)
	script.Parent.ImageTransparency = .6
	wait(0.01)
	script.Parent.ImageTransparency = .5
	wait(0.01)
	script.Parent.ImageTransparency = .4
	wait(0.01)
	script.Parent.ImageTransparency = .3
	wait(0.01)
	script.Parent.ImageTransparency = .2
end

Please tell me what I need to do.

while (true) do
    for i=.1,10 do
        script.Parent.ImageTransparency = i;
	wait(0.02);
    end
    for i=1,10 do
        script.Parent.ImageTransparency = 1 - i;
	wait(0.02);
    end
end;

Boom. Should work now.