1-8
: 1L followed by 2L+3L+4L chase anticlockwise behind Men's line back to
  places
9-16
: 1M followed by 2M+3M+4M chase clockwise behind Ladies' line back to
  places
17-24
: 1s slip step down the centre & back
25-32
: All couples, both hands joined (4s leading) slip step down, 2s+3s+4s
  slip step up under arch made by 1s. End 2 3 4 1