Processing / RGB blend experiments

float[] x = new float [10];
float[] y = new float [10];
int[] clr = new int [10];
color[] c = new color [3];

void setup () {
  size(400, 400, P2D);
  background(0);
  noStroke();
  ellipse(width/2, height/2, 180, 180);

  for (int i = 0; i < x.length; i++) {
  c[0] = color(255, 0, 0);
  c[1] = color(0, 255, 0);
  c[2] = color(0, 0, 255);

  x[i] = random(1, 50);
  y[i] = random(60, 100);
  clr[i] = c[int(random(3))];
  }


}

void draw() {
  blendMode(BLEND);
  fill(255, 10);
  ellipse(width/2, height/2, 180, 180);
  blendMode(SUBTRACT);

        for(int i = 0; i < x.length; i++) {
            fill(clr[i]);
            ellipse(width/2+cos(x[i])*70, height/2+sin(y[i])*70, 160, 160);
            x[i] = x[i] + 0.02;
            y[i] = y[i] + 0.04;
          }

 //saveFrame("cirlce_blend-######.png");

  }