Idea.

I would like to try my hand at a video to show the idea of trees taking over a city, perhaps invading some sort of sky-line (new york or australia etc). I think the best way to do this would be shadow animation.

Some good examples I found of shadow animation, related to my idea, on the Internet:

http://www.myspace.com/video/vid/35003249

http://www.youtube.com/watch?v=yWhl5VU0pKQ