Shown with a cast-on count of 31 stitches.  

• Row 1 (WS): Sl1 wyif, p16, p2tog, purl (1 less st).
• Row 2: Sl1 wyib, k5, ssk, knit (1 less st).
• Row 3: Sl1 wyif, p6, p2tog, purl (1 less st).
• Row 4: Sl1 wyib, k7, ssk, knit (1 less st).
• Row 5: Sl1 wyif, p8, p2tog, purl (1 less st).
• Row 6: Sl1 wyib, k9, ssk, knit (1 less st).
• Row 7: Sl1 wyif, p10, p2tog, purl (1 less st).
• Row 8: Sl1 wyib, k11, ssk, knit (1 less st).
• Row 9: Sl1 wyif, p12, p2tog, purl (1 less st).
• Row 10: Sl1 wyib, k13, ssk, knit (1 less st).
• Row 11: Sl1 wyif, p14, p2tog, purl (1 less st).
• Row 12: Sl1 wyib, k15, ssk, knit (1 less st).