scr3

float x, theta, sz = 80;
int num = 20;
color[] palette = {
  #FF0000, #00FF00, #0000FF
};

void setup() {
  size(500, 500,P2D);
  background(0);
  noStroke();

}

void draw() {
  blendMode(BLEND);
  fill(0, 30);
  rect(0, 0, width, height);
  noStroke();
  blendMode(SCREEN);
  translate(width/2, height/2);
  for (int i=0; i<num; i++) {
    float offSet = i*(TWO_PI/num);
    fill(palette[i%3]);
    pushMatrix();
    rotate(i*(TWO_PI/num));
    x = map(sin(theta), -1, 1, -100, 180);
    sz = map(sin(offSet*2+theta), -1, 1, 10, 80);
    ellipse(x, 0, sz, sz);
    popMatrix();
  }
  theta += 0.0523;

  //if (frameCount%3==0 && frameCount<121) saveFrame("image-###.tif");
}