/** @peep sketch */
void setup() {
size(200, 200);
squareRecursion(0, 0, width, height);
}
void squareRecursion(float x, float y, float w, float h) {
// Draw a rectangle
// Change transparent fill colour
fill(random(255), random(255), random(255), 90);
noStroke();
rect(x, y, w, h);
// Test to see if we should recurse...
if ((random(100) < 80) && (w > 10 || h > 10)) {
// Set a border to go around sub-rectangles
float bx = 3;
float by = 3;
// Calculatue the width and height of sub-rectangles
w = (w - 3*bx) / 2;
h = (h - 3*by) / 2;
// Call the same function to draw the sub-rectangles
squareRecursion(x + bx, y + by, w, h);
squareRecursion(x + bx + w + bx, y + by, w, h);
squareRecursion(x + bx, y + by + h + by, w, h);
squareRecursion(x + bx + w + bx, y + by + h + by, w, h);
}
}