Somewhat different, this simply graphs in time the co-evolution of two populations following the equations designed by Lotka and Volterra. Each equation has a population A or B, a growth rate Ga or Gb, a death rate Da or Db and a coupling rate Ca or Cb. The standard model assumes A is the prey, B the predator. Depending upon parameters the system can settle, oscillate or go chaotic. The default looks to cycle evenly but does in fact become wildly erratic in time.
Alternative models are possible with the same formulae.
These programs are provided free for any non-commercial use.