<iframe width='500px' height='400px' src='https://nest.ktbyte.com/nest#109401' allowfullscreen></iframe>

void setup() {
  size(500, 500);
}
void draw() {
  background(20);
  stroke(150,180,240);
  noFill();
  for (int i=0, count = 12; i<count; i++) {
    float diam = map(i,0,12,0,500);
    strokeWeight(map(sin(frameCount*TWO_PI/90+TWO_PI/2/count*i), -1, 1, 1, 21));
    ellipse(width/2, height/2, diam, diam);
  }
}