Shown with a cast-on count of 30 stitches.  

• Rows 1, 3, 5, 7, 9, 11, 13, and 15 (WS): Purl.
• Row 2: K1, *k2, yo, k4, k2tog, k2, ssk, k2, yo, repeat from * to last st, k1.
• Row 4: K1, *yo, k2, k2tog, k4, ssk, k2, yo, k2, repeat from * to last st, k1.
• Row 6: K1, *yo, k2, k2tog, k6, ssk, k2, yo, repeat from * to last st, k1.
• Row 8: K1, *k2tog, yo, k2, yo, ssk, k8, repeat from * to last st, k1.
• Row 10: K1, *k2tog, yo, k4, yo, ssk, k6, repeat from * to last st, k1.
• Row 12: K1, *k2tog, yo, k6, yo, ssk, k4, repeat from * to last st, k1.
• Row 14: K1, *k2tog, yo, k8, yo, ssk, k2, repeat from * to last st, k1.
• Row 16: K1, *k2tog, yo, k10, yo, ssk, repeat from * to last st, k1.