Iterator<Particle> iterator = particles.iterator();
        List<String> delete = new ArrayList<>();
        while (iterator.hasNext()) {

            Particle p = iterator.next();
            if (delete.contains(p.particleName)) {
                iterator.remove();
            } else {
                for (Particle c : particles) {

                    if (!c.equals(p)) {

                        if (p.locationX.equals(c.locationX) && p.locationY.equals(c.locationY)
                                && p.locationZ.equals(c.locationZ)) {



                            delete.add(c.particleName);

                        }

                    }

                }
            }

        }