Is it possible? And in *reverse* alphabetical order?

Essentially, this: [How can I move files by type recursively from a directory and its sub-directories to another directory?](https://unix.stackexchange.com/questions/1555/how-can-i-move-files-by-type-recursively-from-a-directory-and-its-sub-directorie)

Except that each file is not moved to the destination directory *unless* a separate process has fetched the sole file in that destination directory and moved it elsewhere (thus the target folder is empty and 'ready' for the next file to be moved there).