1-8
: 1s cast to bottom as 4s dance up to top, 4s+2s also 3s+1s dance RH
  across
9-16
: 4s cast to bottom as 1s dance up to top, 1s+2s also 3s+4s dance LH
  across
17-24
: 1s+2s also 3s+4s dance 1/2 R&L, 1s+4s dance 1/2 R&L
25-32
: 1s+3s dance 1/2 R&L, top & bottom couples (2s & 1s) cross RH as middle
  couples change places RH on sides & all set.  2 3 4 1