math

int num = 800, frms=180, sc;
float angle, theta;

void setup() {
  size(540, 540);
  noStroke();
}

void draw() {
  background(238);
  translate(width/2, height/2);

  drawThing(300, 34);
  drawThing(250, 238);
  drawThing(200, 34);
  drawThing(150, 238);
  theta += TWO_PI/frms;
  if (frameCount<frms) saveFrame("img/image-###.gif");
}

void drawThing(float diam, int col) {
  fill(col);
  beginShape();
  float d = 0;
  for (int i=0; i<num; i++) {
    float angle = TWO_PI/num*i;
    float s = 0.5+0.5*map(sin(theta+angle*4.0), -1, 1, -1, 1);
    d = 0.25 + 0.4*pow(s, 0.3);
    d += 0.05*pow(0.5+0.5+cos(7*angle),1.0);
    float x = cos(angle)*d*diam;
    float y = sin(angle)*d*diam;
    vertex(x, y);
  }
  endShape(CLOSE);
}