In October 1967, Tony Pritchett was asked to prepare a computer program for the automatic production of a short section of animated film. The requirement was given as:
In this teaching programme we are merely concerned with giving pupils access to enough results for them to get an order-of-magnitude value for such things as molecular velocities, mean free path, etc. For this particular animation we are treating the thing as a kind of statistical experiment, and what we should aim at doing is to be able to superimpose a circle, centre the starting point for each path, and radius 8 steps, assuming 100 steps for each journey. Thanks to the computer, not to mention yourself, we should have enough results for such a circle to look convincing, i.e. a reasonable cluster of finishing points near the circumference of the circle.
The card deck for the Fortran program still exists so a good re-creation of the original program was possible.
Further details of the FORTRAN program can be found at the Chilton site.