Shown with a cast-on count of 8 stitches.  

• Row 1 (RS): [K1, p1] 4 times.
• Row 2: [Kfb, pfb] 4 times (16 sts).
• Row 3: [K2, [pfb] twice] 4 times (24 sts).
• Row 4: [K1, (k1, p1) in next st, (p1, k1) in next st, k1, p2] 4 times (32 sts).
• Row 5: [K2, [pfb] twice, k2, p2] 4 times (40 sts).
• Row 6: [K2, p2, k1, (k1, p1) in next st, (p1, k1) in next st, k1, p2] 4 times (48 sts).
• Row 7: [K2, [pfb] twice, [k2, p2] twice] 4 times (56 sts).
• Row 8: [[K2, p2] twice, k1, (k1, p1) in next st, (p1, k1) in next st, k1, p2] 4 times (64 sts).
• Row 9: [K2, [pfb] twice, [k2, p2] 3 times] 4 times (72 sts).
• Row 10: [[K2, p2] 3 times, k1, (k1, p1) in next st, (p1, k1) in next st, k1, p2] 4 times (80 sts).
• Row 11: [K2, [pfb] twice, [k2, p2] 4 times] 4 times (88 sts).
• Row 12: [[K2, p2] 4 times, k1, (k1, p1) in next st, (p1, k1) in next st, k1, p2] 4 times (96 sts).