.

                                       G
                               r     r   e      r
                           e         y  G         e
                         y              r             y
                        G              e               G
                        r               y                r
                       e                G                 e
                      y             r        e             y
                      G             y       G            G
                       r              r      e             r
                        e                y                e
                          y             G               y
                           G            r             G
                             r           e            r
                                e        y         e
                                    y    G    y
                                          r
                                          e
                                          y