https://www.youtube.com/watch?v=fXBAq7xZZ80

Ok so ive done a couple of things similar to this in the past but using a drastically differnt method, this method is using object contraint / follow curve path instances, and most of my very recentl uploads have featured this in some way or another. Anyway i thought it might be too similar to past uploads but thought to upload it anyway since its such a completely differnt techique to what i was doing before.

This uses curve path animation so was unable to upload the .blend directly. Please ask in the comments and I can upload the .blend in a zip file as an additional file download.