bubbly spiral

float x, y, theta, sz;

int num=1000;

​

void setup() {

  size(400, 400);

  stroke(255, 150);

  fill(0);

}

​

void draw() {

  background(0);

  float x=width/2, y=height/2;

  float angle=0;

  float radius=30; 

  int c=0;

  for (int i=0; i<num; i++) {

    x = width/2 + sin(angle)*radius;

    y = height/2 + cos(angle)*radius;

    float sz = map(sin(theta+TWO_PI/num*i*40), -1, 1, 20, 100);

    float scal = .5+1.0/num*2*i;

    stroke(255, 200);

    ellipse(x, y, sz*scal, sz*scal);

    angle += radians(3);

    radius += .5;

    c++;

  }

  theta -= 0.0523/2;

}

​