public static void updateBlue() {
    for (int i = 0; i < bOrgs.size(); i++) {
      Organism g1 = bOrgs.get(i);
      g1.move();
      for (int j = i + 1; j < bOrgs.size(); j++) {
        Organism g2 = bOrgs.get(j);
        if (g1.getDist(g2) < 40) {
          g1.closeTo(g2); // mating purposes
        }
      }
    }
  }