1-8
: 1s & 3s turn RH, cast 1 place & turn LH to face 1st crnrs
9-24
: 1s & 3s dance Corner Chain with 1st & 2nd corners :

: 1s change pl RH with 1st crnrs, 1st crnrs turn LH in centre & return to
  places giving RH to 1s who turn LH in centre to face 2nd crnrs

: 1s change places RH with 2nd crnrs, 2nd crnrs turn LH in centre & return
  to places giving RH to 1s & 1s end turning LH back to places
25-32
: 1L & 3L cast up 1 place **while** 1M & 3M cast down 1 place, 1s & 3s
  turn RH & cast 1 place. 2 4 1 5 3