Help with a basic script?

I have this super basic script, but for some reason it doesn't work. It is supposed to rotate an image label, but it does nothing with no errors.

for i = 1,180 do
	script.Parent.ImageButton.Rotation = script.Parent.ImageButton.Rotation - 1
	wait(0.1)
end

for i = 1,180 do
    script.Parent.ImageButton.Rotation = script.Parent.ImageButton.Rotation - 1
    wait(0.1)
    i = i + 1
end