+--+-----------+------------+-----------+-----------+-----------+------------+-----------+--+
    |  +           +            +           +           +           +            +           +  |
    |                                                                                           |
  5 ++                                                                                         ++
    |                                                                                           |
    |                                                                                           |
    |                                                                                           *
    |                                                                                          *|
    |                                                                                         * |
  4 ++                                                                                       A ++
    |                                                                                       *   |
    |                                                                                      *    |
    |                                                                                     *     |
    |                                                                                    *      |
    |                                                                                   *       |
  3 ++                                                                                 A       ++
    |                                                                                 *         |
    |                                                                               **          |
    |                                                                              *            |
    |                                                                             *             |
  2 ++                                                                           A             ++
    |                                                                           *               |
    |                                                                          *                |
    |                                                                         *                 |
    |                                                                        *                  |
    |                                                                       *                   |
  1 ++                                                                     A                   ++
    |                                                                                           |
    |                                                                                           |
    |                                                                                           |
    |                                                                                           |
    |                                                                                           |
  0 ++                                                                                         ++
    |                                                                                           |
    |  +           +            +           +           +           +            +           +  |
    +--+-----------+------------+-----------+-----------+-----------+------------+-----------+--+
      -10         -8           -6          -4          -2           0            2           4