Slowing down an old program to run on a fast CPU?

[Mike Hunter]

Hey everybody,

I was playing around in ports and came across xroach.  Cool program :)
The only problem is that it runs too fast; you can't see the roaches
because they scurry under your windows too quickly.

Is there a general-purpose approach to this kind of problem in the FBSD
world?  I can see myself writing a C program called `slow` that would take
argv[1] as the factor ( > 1) by which argv[2] should be slowed down by.

Anybody else ever come up against this?

Thanks and happy Friday!

Mike