I used the GIMP. I have Photoshop, but it scares me...

I was just messing around. What I did was select the transparent part of the sig (use magic wand tool and click there, it was filled in with black for me). After that, I went down to each layer of the animation and deleted the parts I didn't want (Ctrl+I for invert, then hit delete on each layer of the animation). Last, I just moved the sig part to the bottom (didn't delete anything on that).

Then just save it as an animation.

... Tell me if that helped.

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