1-8
: 1s dance in & cast 1 place, 1s dance down between 3s & cast up to 2nd
  place own sides
9-16
: 2s+1s dance 1/2 double Fig 8 (1s cross up), 1s+3s dance 1/2 double Fig
   8 (1s cross down)
17-20
: 1L+2s also 1M+3s dance RH across 1/2 way & 1s chase clockwise to 2nd
  place own sides
21-32
: 2s+1s+3s dance R&L for 3 couples