Create ffmpeg script

I need a ffmpeg script that will take a multi track avi file and output each track to a separate avi file. For example ffprobe an avi file, determine the number of video tracks if three then something like:
ffmpeg -i input.avi -map 0:0 -vcodec copy track0.avi
ffmpeg -i input.avi -map 0:1 -vcodec copy track1.avi
ffmpeg -i input.avi -map 0:2 -vcodec copy track1.avi