Laptop Computer Controlled Turntable

I had some electronic components and software leftover from a CNC plasma cutting table, and used it to computerize the operation of my turntable. I have a number of short G-code files, each of which rotates the turntable to a specific track.  It is also possible to program a series of moves with a key controlled pause in between.  Thus, the table could rotate to a particular roundhouse track and pause while a locomotive is loaded and then, after a mouse click, rotate to the exit track, then another, etc., etc.