1-8
: 1s+2s also 3s+4s set, dance RH across 1/2 way & chase clockwise 1/2 way.
   3 4 1 2
9-16
: 3s+4s also 1s+2s set, dance LH across 1/2 way & chase anticlockwise 1/2
  way.  1 2 3 4
17-24
: All set, turn 2H to end in middle (1s/3s facing down, 2s/4s facing
  up), 1s+2s also 3s+4s circle 4H round to left (remain in middle facing
  down/up)
25-28
: All set advancing passing facing person, 1s+4s set advancing &
  pass **while** 2s & 3s dance to top/bottom places
29-32
: 4s dance up to top & cast to 2nd place **while** 1s dance down to bottom
  & cast up to 3rd place.  2 4 1 3