The Racers simulations each depict a number of animated runners. The program simulates a foot race.
Animated runners progress across the screen.
A graph is plotted simultaneously to show the distance the runners travel as time goes by. It is based on a set of rules. The rules are a model in a Pascal programmed to follow a hidden set of rules in each Racers simulation. The associated graphs represent distance from the start for each runner at a given time. Time is the independent variable.