I'm trying to create a cover swap effect for a book. Basically, I
want the image source to change from img1.jpg to img2.jpg when I press
the "back cover" line. If I press the "back cover"
line again, the source changes back to img1.jpg. Also, when the covers
are swapping, there will be a fade effect.
I can only do the img1->img2, but not the other way. And I have
no clue how to make a fade effect. Can anyone help my please?