+----------------------------------------------+
       |                                              |
 L1----|..............................................|------L4
       |   .                                       .  |
       |    .                AN1                  .   |
       |     .                                   .    |
       |      ..................................*.....|------L7
       |                                       .      |
L2-----|.......................................       |
       |                                              |
L3-----|..............................................|------L8
       |                                              |
       +----------------------------------------------+