Techniques used 
K: Knit
P: Purl
Yo: Yarn over
K2tog: Knit 2 together
Ssk: Slip slip knit
Pattern
Multiple of 15 sts, + 2.
Row 1 (RS): p2, *k13, p2*.
Row 2: k2, *p13, k2*.
Row 3: p2, *k10, k2tog, yo, k1, p2*.
Row 4: k2, * yo, p2,  p2tog, p9, k2*.
Row 5: p2, *k8, k2tog, k1, yo, k2, p2*.
Row 6: k2, *p1, yo, p3,  p2tog, p7, k2*.
Row 7: p2, *k6, k2tog, k2, yo, k3, p2*.
Row 8: k2, *p2, yo, p4,  p2tog, p5, k2*.
Row 9: p2, *k4, k2tog, k3, yo, k4, p2*
Row 10: k2, *p3, yo, p5,  p2tog, p3, k2*.
Row 11: p2, *k13, p2*.
Row 12: k2, *p13, k2*.
Row 13: p2, *k1, yo, ssk, k10, p2*.
Row 14: k2, *p9, ssp, p2, yo, k2*.
Row 15: p2, *k2, yo, k1, ssk, k8, p2*.
Row 16: k2, *p7, ssp, p3, yo, p1, k2*.
Row 17: p2, *k3, yo, k2, ssk, k6, p2*.
Row 18: k2, *p5, ssp, p4, yo, p2, k2*.
Row 19: p2, *k4, yo, k3, ssk, k4, p2*.
Row 20: k2, *p3, ssp, p5, yo, p3, k2*.
Repeat rows 1-20.