Knitted in a multiple of 10 sts, + 1 and 4-row repeat.
Row 1 (Wrong Side) Purl all sts.
Row 2 (Right side): K1, * (yo, ssk) twice, k1, (k2tog, yo) twice, k1; rep from * to end.
Row 3: Purl all sts..
Row 4: K2, * yo, ssk, yo, S2KP, yo, k2tog, yo, k3; rep from * to last 9 sts, yo, ssk, yo, S2KP yo, k2tog, yo, k2.
Knit: K | Purl: P | Yarn over: Yo | Knit 2 sts together: K2tog | Slip slip knit: Ssk.
Slip 2 stitches as if to knit 2 stitches together, knit 1, pass 2 slipped stitches over: S2KP.