1. 8.
    0
    up up up up up up up
    ···
  2. 7.
    0
    up up up up up up
    ···
  3. 6.
    0
    up up up up up up
    ···
  4. 5.
    0
    up up up up up
    ···
  5. 4.
    0
    up up up up up
    ···
  6. 3.
    0
    up up up up up
    ···
  7. 2.
    0
    up up up up up
    ···
  8. 1.
    0
    up up up up up
    ···