Mayo Clinic Sound Envelope

The Mayo clinic here in Jacksonville is creating a covered walkway that will take visitors from the main hospital to other buildings on the property. A sound system is being installed to assure that the pedestrian will always hear sound from properly placed speakers creating a " sound envelope". I am writing the music for this project. I have about a half an hour of ambient, atmospheric type of compositions, that will continuously be played. Each cue is about a minute in length and will be randomly played to prevent any kind of repetition. I am aiming for an hours worth of music or 60 different cues. Should be very interesting:)