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// Learning Processing
// Daniel Shiffman
// Exercise 13-9: Complete the code which generates the following pattern (Note: the solution
// uses lines, although it would also be possible to create the image using rotated rectangles,
// which is covered in Chapter 14).
void setup() {
size(480, 270);
void draw() {
branch(width/2, height, 180);
void branch(float x, float y, float h) {
line(x, y, x-h, y-h);
line(x, y, x+h, y-h);
if (h > 2) {
branch(x-h, y-h, h/2);
branch(x+h, y-h, h/2);
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