public void setToZero(){
        beings.clear();
        for (Being being: zeroBeings){
            if (being.isHuman()){
                beings.add(new Human(being.getX(), being.getY()));
            }
            if (being.isZombie()){
                beings.add(new Zombie(being.getX(), being.getY()));
            }
        }
    }