Modulo.pde

float centerx;
float centery;

void setup() {
  size(900, 900);

  centerx = width/2;
  centery = height/2;
}

void draw() {
  background(255);
  stroke(0, 50);
  strokeWeight(1);
  spiral();

  System.out.println("DONE");
  noLoop();
}

void mouseClicked() {
  saveFrame("spiral.png");
}
  

float radius(float theta) {
  return 12*(float)Math.sqrt(theta);
}

void spiral() {
  float px = centerx;
  float py = centery; 
  for (float theta = 0; theta < 1000 * PI; theta = theta + 0.001) {
    float cx = centerx + radius(theta)*((float)Math.cos(theta));
    float cy = centery + radius(theta)*((float)Math.sin(theta));
    line(px, py, cx, cy);
    px = cx;
    py = cy;
  }
}