Kikis animation.

Ok after ‘staring’ as the dancer in kikis flowers in the road video,"http://indiestore.7digital.com/loki" im no doing the animation for her too. Its about a 4000 frame job. She wants a very sketchy white chalk on black background feel to it, which she found in some of my work apparently.
The idea is where ever my feet touch the ground a flower grows, and when my foot leaves it wilts away and dies. Now the first half of the movie being quite slow means it will look rather sombre, but the sencond half since sound and movement increases a lot, theres gonna be alotta flowers going everywhere, which should be interesting.
Iv got how im gonna do the flowers sorted, but she also wants a crow flying about and arrows shooting up from the flowers at the end.
The arrows should be simple, graphics tablet and time im sorted. It’s the crow that im worried about, getting the flight looking right. Also the fact she wants it flying following me about on screen for 3 minutes, but looking at the movie, theres not much room and it may look a little weird, especially since she wants it to look like iv not seen it.
Im a little worried about this one and I know its gonna take a long time, but atleast it will count towards professional practice, and may give me another ‘skill’ to add to the multimedia belt.