the number of frames to step by (can be negative).
the number of times to step.
-- part contents for background part 4
----- text -----
This command steps the disc forward by the specified number of frames, and then repeats the process the number of times specified in the second parameter. The number of frames can be either positive (step forward) or negative (step backward).
If the count parameter is left off, it defaults to 1. If the number of frames parameter is not specified, it also defaults to 1.