Applications :: How To Create Scrolling Arbitrary Output In Terminal?

I'd like to create the look that something is happening in Terminal without actually doing anything. Sort of like how the Apple ]['s ROM checksum was used for the first-person view in The Terminator.

I'd prefer something that was just providing output, like a checksum, NOT moving or editing files or directories.

Terminator ][? o.o

The 12 Gauge auto-loader, the .45 long slide with laser sighting, phase plasma rifle in a 40 watt range, the Uzi 9mm... two oxen died crossing the river