Would be neat if you could somehow splice them into a sequence but I think you'd have some alternating sequences that determine position and sequences that really code information.
yes, I was very impressed by the title, but once I dug into this it was sort of like "well we could probably have accomplished this ~10 years ago when optogenetics first came out". Definitely a situation where branding the title got something "so silly that no one did it before" got it to be noticed.