This all has to happen without any human intervention, so the central computer software has been programmed and extensively tested to make sure all corrections can be made on the fly.

You can rewrite DNA on the fly, and you're using it to turn people into dinosaurs? But with tech like that, you could cure cancer!" "But I don't want to cure cancer. I want to turn people into dinosaurs."

The frost was such that the birds fell on the fly.