public static void addNew() {
    for (Organism org: a) {
      switch (org.species) {
        case Organism.BLUE:
            bOrgs.add(org);
            break;
        case Organism.RED:
            rOrgs.add(org);
            break;
        case Organism.YELLOW:
            yOrgs.add(org);
            break;
        case Organism.ORANGE:
            oOrgs.add(org);
            break;
        default:
            System.out.println(org.species + "??");
      }
    }
    a.clear();
  }