GoldenRatio Circles

void setup() {

  size(800, 800);

}

​

void draw() {

  background(200);

  testEllipse();

  translate(mouseX, mouseY);

  testEllipse();

  for (float deg = 0; deg<360; deg+=20) {

    float d = radians(deg);

    pushMatrix();

    rotate(d);

    int numCircs = 20;

    //taper each circle so the tail gets smaller towards the end

    for (int circCount = 0; circCount < numCircs; circCount++) {

      float diam = map(circCount, 0, numCircs, 5, 36);

      translate(10, 0);

      fill(255);

      ellipse(0, 0, diam, diam);

    }

    testEllipse();

    popMatrix();

  }

}

​

//using this to test push and pop matrix

void testEllipse () {

  fill(255, 0, 23);

  ellipse(0, 0, 30, 30);

}

​