1-8
: 1s & 4s set & petronella turn into centre **while** 2s & 3s step
  up/down, 1s+2s also 3s+4s dance RH across
9-16
: 1s & 4s set & petronella turn to 2nd/3rd place opposite sides, 1s+4s
  dance LH across to end facing corners
17-24
: All set & pass facing person RSh, 2s+3s dance LH across 1/2 way to end
  facing corners & pass facing person RSh
25-32
: 1s+4s dance LH across, all (on opp sides) set & cross RH. 3 1 4 2