• CO 21 STS
• Row 1: K1 *YO, K3, S1PW, K2TOG, PSSO, K3, YO, K1*
• Row 2, 4, 6, 8: *P*
• Row 3: K1 *K1, YO, K2, S1PW, K2TOG, PSSO, K2, YO, K2*
• Row 5: K1 *K2, YO, K1, S1PW, K2TOG, PSSO, K1, YO, K3*
• Row 7: K1 *K3, YO, S1PW, K2TOG, PSSO, YO, K4*
• Repeat rows 1-8, until desired length

Abbreviations

• *– * – repeat between asterisks
• CO – cast-on (long-tail cast-on method)
• K – knit stitches (example: K1 means to knit 1 stitch)
• K2TOG – knit 2 stitches together
• P – purl stitches (example: P2 means to purl 2 stitches)
• PSSO – pass slipped stitch over
• S1PW – slip one stitch purl-wise
• STS – stitches
• YO – yarn over