Design our app intro screens

Hi, We have an app we wanted to design a tutorial-like intro for our app, consisting of 3-4 screens. We have in our mind something that looks like the Dropbox app intro. Attached you can see a few snapshots of it, it is animated (very simple) so maybe installing the app (if you already have it just remove and install again for the intro) would help you imagine what we need. The idea is to describe these steps in simple animated graphics (e.g dropbox style): 1. User logs in with Facebook and have his friends list added 2. User records the audio message 3. User sends the audio message and it gets played on the receivers device This is a very simple description of it, but we need to work together on some idea for how it should be represented and also other details. At this stage we want to select someone who already had similar experience with designing simple graphics like that and for him/her to know the scope of this project. Then we will discuss more details after hiring. Cheers, Arman