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

1-8
: 1M+4L also 1L+4M dance figs of 8 on sides round 2s+3s (dancing
  between 2s/3s to start)
9-16
: 1s & 4s turn partners RH 1.1/2 times, cast in 1 place & dance 1/2 RH
  across to end in prom hold with other partner facing 2M/3M
17-24
: 1M+4L also 1L+4M dance RSh reels of 3 on sides & end in centre facing
  out sides
25-32
: 1s+4s 1/2 turn corners with nearer hand, cross down/up 1 place **while**
  corners cast to ends & turn 'new' corners once round to end 2 4 (1)(3)