@Override
  public int compareTo(ErrorStripe stripe) {
    if (stripe == this) return 0;
    if (stripe == null || stripe.myLayer < myLayer) return -1;
    if (stripe.myLayer > myLayer) return 1;

    int thisRGB = myColor.getRGB();
    int thatRGB = stripe.myColor.getRGB();
    if (thatRGB == thisRGB) return 0;
    return thatRGB < thisRGB ? -1 : 1;
  }
@Override
  public int compareTo(ErrorStripe stripe)