Shown with a cast-on count of 7 stitches.  

• Row 1 (RS): K4, k2tog, yo, k1.
• Rows 2, 4, 6, 8, 10, and 12: K1, k2tog, yo, knit.
• Row 3: K1, [k1, yo] twice, k1, k2tog, yo, k1 (9 sts).
• Row 5: K1, [k1, yo] twice, k3, k2tog, yo, k1 (11 sts).
• Row 7: K1, [k1, yo] twice, k5, k2tog, yo, k1 (13 sts).
• Row 9: K1, [k1, yo] twice, k7, k2tog, yo, k1 (15 sts).
• Row 11: BO 8 sts, knit to last 3 sts, k2tog, yo, k1 (7 sts).