1-8
: 1s dance down the middle & cast round 3s to original place **while** 4s
  cast up to top & dance down middle to original place. 1s & 4s set.
9-16
: 1s+2s also 3s+4s dance double Fig of 8 (1s & 3s cross down, 2s & 4s cast
  up)
17-20
: 1s & 3s giving RH cross down thru couple below & cast up to partner's
  place.
21-24
: 2s & 4s giving LH cross up thru couple above & cast to partner's place.
  (1) (2) (3) (4)
25-32
: 1s+2s dance 1/2 LH across, 1s+3s dance 1/2 RH across, 1s+4s dance 1/2 LH
  across, all set 2 3 4 1