ROW 5: Bk Lp sc next 4 sts, fasten off Black, pick up White, bk lp sc last 2 sts, ch-1, turn.
ROW 6-35: Rep row 2-5 7 more times.
ROW 36: Bk Lp sc ea st across, fasten off.
PIANO BACK:
ROW 1: With Black and H hook ch-28, hdc 3rd ch from hook, hdc ea ch across, ch-1, turn. (26 sts)
ROW 2-7: Hdc ea st across, ch-1, turn.
ROW 8: Hdc dec next 2 sts, hdc ea st across, ch-1, turn. (25 sts)
ROW 9: Hdc ea st across, ch-1, turn.
ROW 10: Rep row 8. (24 sts)
ROW 11: Rep row 9.
ROW 12: Rep row 8. (23 sts)
ROW 13: Hdc ea st across to last 2 sts, hdc dec last 2 sts, ch-1, turn. (22 sts)
ROW 14: Rep row 8. (21 sts)
ROW 15: Rep row 13. (20 sts)
ROW 16: Rep row 8. (19 sts)