drop black, pick up white, sc last 5 sts, ch-1, turn.
ROW 5: Sc next 4 sts, pick up black DMC and working white behind sts, sc next 6 sts, drop black, pick up white, sc last 4 sts, ch-1, turn.
ROW 6: Sc next 3 sts, pick up black DMC and working white behind sts, sc next 8 sts, drop black, pick up white, sc last 3 sts, ch-1, turn.
ROW 7: Sc next 2 sts, pick up black DMC and working white behind sts, sc next 10 sts, drop black, pick up white, sc last 2 sts, ch-1, turn.
ROW 8: Sc next st, pick up black DMC and working white behind sts, sc next 12 sts, drop black, pick up white, sc last st, ch-1, turn.
ROW 9: Rep row 9.
ROW 10: Sc next st, drop white, pick up black, sc next 6 sts, drop black, pick up white, sc next 2, drop white, pick up black, sc next 6, drop black, pick up white, sc last st, ch-1, turn.
ROW 11: Sc next st, drop white, pick up black, sc next 5 sts, drop black, pick up white, sc next 4, drop white, pick up black, sc next 5, drop black, pick up white, sc last st, ch-1, turn.
ROW 12: Sc next 2 sts drop white, pick up black, sc next 3 sts, drop black, pick up