1/** 2 * Recursion. 3 * 4 * A demonstration of recursion, which means functions call themselves. 5 * Notice how the drawCircle() function calls itself at the end of its block. 6 * It continues to do this until the variable "level" is equal to 1. 7 */ 8 9void setup() 10{ 11 size(200, 200); 12 noStroke(); 13 smooth(); 14 noLoop(); 15} 16 17void draw() 18{ 19 drawCircle(126, 170, 6); 20} 21 22void drawCircle(int x, int radius, int level) 23{ 24 float tt = 126 * level/4.0; 25 fill(tt); 26 ellipse(x, 100, radius*2, radius*2); 27 if(level > 1) { 28 level = level - 1; 29 drawCircle(x - radius/2, radius/2, level); 30 drawCircle(x + radius/2, radius/2, level); 31 } 32} 33