Fishtank flash

hi all
who of you is able to let me know how much it will cost me for you to do a flash movie in the concept of a black screen where a bottle is tipped into, the screen changes more to a fishtank colour and some fishes come to view, which look very surprised to be able to see again. Does the description sound exciting for someone arty to have a go? Or has some tips on how to achieve it?
Any help highly appreciated.