1-8
: 1L+2M also 3L+4M set & turn RH into line up/down in the middle (Men
  facing up, Ladies facing down) & dance 1/2 reel of 4 to
  finish 4M/3L/2M/1L (on middle) facing 2L/1M/4L/3M (on sides)
9-16
: 1M+3L+3M+1L also 4M+2L+2M+4L dance RSh parallel reels of 4 on the
  Men/Ladies sides
17-24
: 1M+2L also 3M+4L set & turn LH into line up/down in the middle (Men
  facing down, Ladies facing up) & dance 1/2 reel of 4. 4M & 2M step
  down **while** 3L&1L step up ready for ...
25-28
: 4s+3s (4L facing 3M) also 2s+1s (2L facing 1M) dance RH across to finish
  on opposite sides (4) (3) (2) (1)
29-32
: 1s swing at the bottom **while** 4s+3s+2s chase 1/2 way clockwise to
  finish on own sides 2 3 4 1