1-8
: 1s Adv+Ret 2 steps. 2s repeating on bar 3, 3s repeat on bar 5 & 4s
  repeat on bar 7
9-16
: **While** 4s complete their Adv+Ret, 1s start a Snowball Grand Chain to
  end 3(2)4(1)
17-24
: 3s+2s & at the same time 4s+1s dance Ladies' Chain
25-26
: 3s cross RH,
27-28
: 3s+2s dance RH across 1/2 way (2 bars) **while** bars 27-30 4s turn RH
  for 4 bars
29-32
: 1s turn 1.1/2 times for 4 bars  2 3 4 1