{{explanation}}
3s & 4s start on opposite sides

1-8
: 1L (also 4L) dances Fig 8 round 2s (3s) **while** 1M (also 4M) sets
  dances 1/2 Fig 8 round 2s (3s) & dances across to place facing out 1 2
  (3) (4)
9-16
: LSh reels of 4 on sides. Bar 16 2L+3M also 2M+3L turn 1/2 RH (instead of
  passing RSh) & retain RH, 1M & 4M face out
17-20
: 1M followed by 1L & 4M followed by 4L chase 1/2 round clockwise to
  opposite ends **while** 2L+3M & 2M+3L continue to turn RH. 4 2 (3) (1)
21-24
: 4s+2s & 3s+1s change places LH on sides; 4L+1M & 4M+1L turn RH 3/4 into
  line of 4 across **while** 2s & 3s set
25-32
: 1s+4s dance reel of 4 across, finishing 2 4 (1) (3)