1-8
: 1s petronella turn into centre & set **while** 2s step up & set, 1s+2s
  RH across & end in line across (1s BtoB in the middle facing opp
  partner)
9-16
: 1s+2s reel of 4 across ending on own sides with 1s in 2nd place
17-24
: 1s followed by 2s dance 4 slip steps down middle & set, 1s & 2s dance
  down 1 more step & 2s leading cast up own side
25-32
: 2s+1s R&L