1-8
: All set, 1L+2M also 3L+4M change places passing LSh, 1L+4M turn
  LH **while** 2M+3L chase anticlockwise 1/2 way
9-16
: All set, 1M+2L also 3M+4L change places passing RSh, 1M+4L turn
  RH **while** 2L+3M chase clockwise 1/2 way
17-24
: All circle 8H round & back
25-32
: 1s dance 1/2 Fig of 8 round 3s **while** 4s dance 1/2 Fig of 8 round 2s,
  1s+4s dance RH across