/**  * Pentigree L-System  * by Geraldine Sarmiento (NYU ITP).  *  * This code was based on Patrick Dwyer's L-System class.  */PentigreeLSystem ps;void setup() {  size(640, 360);  smooth();  ps = new PentigreeLSystem();  ps.simulate(3);}void draw() {  background(0);  ps.render();}