1–
: 1c+2c & 3c+4c cross Rsh (W making arches) | cross back Rsh (M making arches) ; 1c & 4c lead out of ends & back **while**{4} 2c+3c RHA and change places, 3c making arch (1,3,2,4).
9–
: 1c+3c & 2c+4c circle4 R, at end couples change places (3c & 4c making arches) ; 3c+2c lead out of ends & back as 1c+4c RHA and change places, 4c making arch (3,4,1,2).
17–
: All ½ G-Chain (start along the sides) ; all A{1}&R{1} and turn BH (2x,1x,4x,3x)
25–
: 2c+1c & 4c+3c circle4 L ½ | 1c cast off one (2c up) ; cross RH & cast off one (3c up) | cross LH & cast (4c up) (2,3,4,1)