Shown with a cast-on count of 34 stitches.  

• Rows 1, 3, 5, 7, 9, 11, 13, 15, 17, 19, 21, 23, 25, 27, 29, 31, 33, 35, 37, 39, 41, 43, 45, 47, 49, 51, 53, 55, 57, 59, 61, 63, 65, 67, 69, 71, 73, 75, 77, 79, 81, 83, 85, 87, 89, 91, 93, 95, 97, and 99 (RS): K1, ssk, *k12, k2tog, ssk, repeat from * to last 15 sts, k12, k2tog, k1 (multiple of 14 sts, plus 16).
• Rows 2, 4, 6, 16, 18, 20, 22, 24, 26, 32, 34, 36, 38, 40, 42, 48, 50, 52, 54, 56, and 58: K7, *[kfb] twice, k12, repeat from * to last 9 sts, [kfb] twice, k7 (multiple of 16 sts, plus 18).
• Rows 8, 10, 12, 14, 28, 30, 44, 46, 60, 62, 64, 66, 68, 70, 72, 74, 76, 78, 80, 82, 84, 86, 88, 90, 92, 94, 96, 98, and 100: K3, p4, *[pfb] twice, p12, repeat from * to last 9 sts, [pfb] twice, p4, k3 (multiple of 16 sts, plus 18).