Rainbow blanket

float r=0;

void setup(){

  size(700,700);

  noStroke();

  noCursor();

  background(0);

}

void draw(){

  colorMode(HSB,200);

  background(0);

  translate(width/2, height/2);

  for(float x = 150; x >= -150; x-=5){

    for(float y = 150; y >= -150; y-=5){

      float d = dist(x, y, 0, 0);

      fill(r%200, 255, 255);

      pushMatrix();

      translate(x,y);

      rotate(radians(1.5*(d - frameCount)));

      ellipse(x, y, 3, 3);

      ellipse(-x, -y, 3, 3);

      popMatrix();

      r+=.05;

    }

  }

}