Introduction - If you have any usage issues, please Google them yourself
This routine draws Barnsley s fern, The transformations for the fern are each in the form T (x, y = (a* x+ B* y+ E, c* x+ D* y+ F). If the probability that a particular transformation T is selected is p, you can characterize each transformation by providing the values of a, b, c, d, e, f, and p, in that order.