1-8
: 1L+2L also 3M+4M cross passing partner by LSh & cast (Ladies down & Men
  up) to change places, repeat passing opposite person by the LSh
9-16
: 1M+2M also 3L+4L repeat bars 1- 8 but passing by RSh
17-24
: 1s slip step down the middle & up
25-32
: 1s cast to 4th place own sides & all turn partners LH