Shown with a cast-on count of 37 stitches.  

• Rows 1, 3, 5, 7, 9, 13, 17, 19, and 21 (RS): K1, yo, k1, yo, [ssk] twice, k1, k2tog, yo, k1, yo, k1, yo, [ssk] twice, k1, k2tog, yo, k1, yo, k1, yo, [ssk] twice, k1, k2tog, yo, k1, yo, k1, yo, [ssk] twice, k1, k2tog, yo, k1.
• Rows 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, and 24: Purl.
• Rows 11 and 15: K1, yo, ssk, k1, k2tog, yo, k1, yo, ssk, k1, k2tog, yo, k1, yo, ssk, k1, k2tog, yo, k1, yo, ssk, k1, k2tog, yo, k1, yo, ssk, k1, k2tog, yo, k1, yo, ssk, k1, k2tog, yo, k1.
• Row 23: *K2, yo, k2tog, yo, ssk, repeat from * to last st, k1.