{{explanation}}
Square set with 5s in centre, 5M back to 4s, 5L back to 2s

1-8
: 1s+2s+3s+4s chase clockwise round back to place **while** 5s turn RH &
  turn LH finishing facing 1s
9-16
: 5s dance out between 1s, separate & cast, dance through centre, round 3s
  (1L RSh round 3L, 1M LSh round 3M) & into centre again
17-20
: 5L+2s dance RH across, 5M+4s dance LH across **while** 1s & 3s turn
  partner RH
21-24
: 5L+1s & 5M+3s dance RH across **while** 2s & 4s turn partner RH. End 5s
  facing 1s, all 5 couples take prom hold
25-32
: 5s+1s change places passing RSh, 1s+4s, 4s+3s, 3s+2s change places
  similarly. End 2s in centre facing new top couple