Batch file that copies 12 files from one folder to another, then deletes the copied files after 24 hours?

I'm looking for a .bat that copies 12 files from one folder to a subsequent sub-folder, at random, then after 24 hours, deletes all 12 files while randomly selecting 12 more. From what little I know of .bat files and from what I researched on here, I couldn't seem to find the code necessary to accomplish this properly. Any and all help is appreciated.