This starts with the Ridge pattern used to check your gauge, then a Check Slip Stitch Pattern (over a multiple of 4 stitches)

1 Hank of Koigu KPPPM in #2163-0009 (A)
2 Hanks of Koigu KPPPM in #2164-0005 (B)
3 Hanks of Koigu KPPPM in #2165-0008 ©

for a total of 1,020 yards