1-8
: 1s turn RH cast 1 place, turn LH & 1L casts up as 1M casts down to form
  lines of 3 across facing each other
9-16
: 1L+2s & 1M+3s set twice then 1s cast back to 2nd places & turn RH ending
  on own sides
17-24
: 2s+1s+3s set twice & turn partners 2H
25-32
: 2s+1s dance R&L