//method for activating circle collider private void Circle() { for (int i = 0; i < asteroids.Count; i++) { if (detect.CircleCollision(ship, asteroids[i])) { ship.GetComponent <SpriteRenderer>().color = Color.red; asteroids[i].GetComponent <SpriteRenderer>().color = Color.red; } else { ship.GetComponent <SpriteRenderer>().color = Color.white; asteroids[i].GetComponent <SpriteRenderer>().color = Color.white; } } }