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

1-8
: 1s & 4s dance 1/2 Fig of 8 round 2s/3s, dance down/up to pass other
  dancer RSh & turn right about to face them
9-16
: 4s+1s circle left, set turning to face corner & change places RH with
  corner & end facing them
17-24
: All dance double diagonal reels of 4 giving LH in centre
25-32
: 2M followed by partner dance Fig of 8 round 4s (RSh to 4M) **while** 3M
  followed by partner dance Fig of 8 round 1s (RSh to 1M) with 2s ending
  between 4s, 3s between 1s
33-40
: All circle 8H round & back to end 2 4 (1)(3)