Our animated flag generator is a hit, and we like the background in it (the sky as seen from a very pleasant seaside town in Italy, of which we have fond memories). People sometimes ask for a different background, or a blank background. We've just updated a version of the generator that lets you do just that:
For your own background, add a picture using the "+" button as usual, and drag it from the flag onto the background. For a blank background, well, you don't have to do anything at all. Click here to get started on your own flag!