Because of the small display capacity and low brightness, and difficulty to display secondary information, traditional radar random scan display is being replaced by radar raster scan display.

I scan the names on the doors, butnone of them suggests anything to me; finally I select at random and slide mybookmark along the lock until the catch pushes back and I’m in.

Loop repeats the cycle with a newly generated random code until a scan of the rows does not produce a match.