Why do you need a code sample? What you just described is exactly how to do it. Just go through the command reference for the commands which do what you described (eg. CreateSprite to create a blank sprite, LoadAnimTexture to load the animated texture, etc.)
Actually come to think of it I don't think you need a brush. You can apply the texture directly to the sprite without a brush using EntityTexture. So the code to do what you described is exactly three lines:
sprite=CreateSprite()
texture=LoadAnimTexture("whatever"...)
EntityTexture sprite,texture
Actually come to think of it I don't think you need a brush. You can apply the texture directly to the sprite without a brush using EntityTexture. So the code to do what you described is exactly three lines:
sprite=CreateSprite()
texture=LoadAnimTexture("whatever"...)
EntityTexture sprite,texture