Shown with a cast-on count of 7 stitches.  

• Row 1 (WS): K1, *p1, k1, repeat from * to last 2 sts, p1, k1.
• Rows 2 and 6: P1, p1, *sl1 wyif, p1, repeat from * to last st, p1.
• Rows 3 and 7: K1, *k1, p1, repeat from * to last 2 sts, k1, k1.
• Rows 4 and 8: P1, sl1 wyif, *p1, sl1 wyif, repeat from * to last st, p1.
• Rows 5 and 9: K1, *k1, ctr dbl inc, repeat from * (multiple of 4 sts, plus 1).