1–
: 1c+4c fig8 round nearest C (who step to end on [1–2], finish between that C on own side, in facing lines across.
9–
: All A&R up/down ; All turn person opposite RH
17–
: 1c+4c RHA, LHA, finish on sidelines (2,1,4,3)
25–
: All A&R across ; All Turn P RH, finish 2c in 1pl and other Cs making arches (2,1,4,3)
33–
: 2c turn RH | lead down the midde (2W leading) to bottom {4} | All step back to (1,4,3,2)

{{explanation}}
Repeat from new places, but on [33–40] the bottom couple, turning LH, moves up to the top.  Order now (3,4,1,2), using the initial numbering of bar [1].  Repeat {40+40}, leading from top on 3rd time through, from bottom on 4th time.