Basic Phyllo

  size(200,200);
  smooth();
  ellipseMode(RADIUS);
  background(255);
  
  fill(0);
  int nbr_circles = 200;
  
  float phi = (sqrt(5)+1)/2 - 1;            // golden ratio
  float golden_angle = phi * TWO_PI;        // golden angle
  float lg_rad = width * .45;
  
  float sm_rad = 2;
  float cx = width/2;
  float cy = height/2;
  
  for (int i = 1; i <= nbr_circles; ++i) {
    float ratio = i/(float)nbr_circles;
    float angle = i*golden_angle;
    float spiral_rad = ratio * lg_rad;
    float x = cx + cos(angle) * spiral_rad;
    float y = cy + sin(angle) * spiral_rad;
    ellipse(x, y, sm_rad, sm_rad);
  }