1-8
: 1s set, cast 2 places & lead up to top **while** 2s (bar 3) set, cast 1
  place & lead up to 2nd place **while** 3s (bar 5) set, cast into
  middle
9-16
: 1s+2s+3s Promenade & end with 1s casting to 2nd place
17-24
: 1s cross down, cast up behind 3s, cross up & cast to 2nd place
25-32
: All petronella turn into middle, set & turn partner RH 1.1/4 times