With A, cast on 91 (109) sts.
Rows 1 and 2: Working back and forth on circular needle as if working on straight needles, with A, knit.
Row 3: K1 with B, *k1 with C, k1 with B, rep from * across.
Row 4: K1 with B, *p1 with C, k1 with B, rep from * across.
Rows 5 and 6: With A, knit.
Row 7: K1 with C, *k1 with B, k1 with C, rep from * across.
Row 8: P1 with C, *k1 with B, p1 with C, rep from * across.
Rep Rows 1-8 until piece measures about 36 (48) in. [91.5 (122) cm] from beg, end with a Row 6. Bind off.
From RS, with A, pick up and k 82 sts along one long side of Blankie. Knit 1 row. Bind off. Rep edging on remaining long side of Blankie.
Weave in ends.