HD Animation of Flag blowing in the wind

Hello, I need the graphic development of a flag and then animation of the flag, as it would appear blowing in the wind on a flagpole. The flag design should be: 1) dark blue (navy); 2) in the center of the flag should appear a cloud (the cloud should appear as a platform); 3) on top of the cloud should appear the image of a walled city with a castle. The animation should be horizontally extended from a flagpole, allowing the details of the flag to be seen but to appear to be gently blowing in the wind.