Create Gif Animation

Ok, I've attached an image of a website header I designed. I need someone to take the image of the american flag that is on there an animate it so it looks like it is waving. The animated file must be in gif format only. The flag must also be close to the same size as the one on the header, maybe slightly larger so that it appears slightly realistic in perspective. There is an Oklahoma state flag behind the american flag, don't remove it or animate it. I just need the american flag to wave. If you have to replace both flags to make it work feel free. Serious inquiries only. This is a small budget project. Need done asap.