private boolean hasEnemyInArea(int number, double radius){
        for (int i = 0; i < beings.size(); i++){
            if (((beings.get(i).isZombie() && beings.get(number).isHuman()) || (beings.get(i).isHuman() && beings.get(number).isZombie())) && getDistance(i, number) < radius){
                return true;
            }
        }
        return  false;
    }