1-8
: 1s set to 2s on the sides both couples moving in, 1s dance under 2s arch
  to set to 3s, 1s dance under 3s arch
9-16
: 1s set to 4s & dance under 4s arch to 4th places facing out, 1s cast up
  to 1st places
17-24
: 2s dance Figs of 8 round 1s **while** 4s dance Figs of 8 round 3s
25-32
: 1s & 3s dance DoSiDo with partners, 1s cast to 4th places