Pin Box colour slip-stitch knitting. It looks complicated but is not difficult.
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  • On RS rows, slip stitches with yarn in back.
  • On WS rows, slip stitches with yarn in front.
Color A, cast on a multiple of 12, + 3.
Row 1 - RS: Color A,  Knit.
Row 2 and all WS rows: With same color used on previous row, purl the purl stitches and slip the slipped stitches as they face you.
Row 3: Color B, K1, * SL1, K11; rep from * to last 2 sts, SL1, K1.
Row 5: Color A, K2, * SL1, K9, SL1, K1; rep from * to last st, K1.
Row 7: Color B, (K1, SL1) twice, * K7, (SL1, K1) twice, SL1; rep from *, ending last rep with (SL1, K1) twice.
Row 9: Color A, K2, SL1, K1 , SL1, * K5, (SL1, K1) 3 times, SL1; rep from *, ending last rep with (SL1, K1) twice, K1.
Row 11: Color B, (K1, SL1) 3 times, * K3, (SL1, K1) 4 times, SL1; rep from *, ending last rep with (SL1, K1) 3 times
Row 13: Color A, K2, * SL1, K1; rep from * to last st, K1.
Row 15: Color B, (K1, SL1) 3 times, * K3, (SL1, K1) 4 times, SL1; rep from *, ending last rep with (SL1, K1) 3 times
Row 17: Color A, K2, SL1, K1 , SL1, * K5, (SL1, K1) 3 times, SL1; rep from *, ending last rep with (SL1, K1) twice, K1.
Row 19: Color B, (K1, SL1) twice, * K7, (SL1, K1) twice, SL1; rep from * to last 11 STS, K7, (SL1, K1) twice.
Row 21: Color A, K2, * SL1, K9, SL1, K1; rep from * to last st, K1.
Row 23: Color B, K1, * SL1, K11; rep from * to last 2 sts, SL1, K1.
Row 25: Color A, Knit.
Row 27: Color B, K7, * SL1, K11; rep from *, ending last rep with K7.
Row 29: Color A, K6, * SL1, K1, SL1, K9; rep from *, ending last rep with K6.
Row 31: Color B, K5, * (SL1, K1) twice, SL1, K7; rep from *, ending last rep with K5
Row 33: Color A, K4, * (SL1, K1) 3 times, SL1, K5; rep from *, ending last rep with K4.
Row 35: Color B, K3, * (SL1, K1) 4 times, SL1, K3; rep from * to end.
Row 37: Color A, K2, * SL1, K1; rep from * to last st, K1.
Row 39: Color B, K3, * (SL1, K1) 4 times, SL1, K3; rep from * to end.
Row 41: Color A, K4, * (SL1, K1) 3 times, SL1, K5; rep from *, ending last rep with K4.
Row 43: Color B, K5, * (SL1, K1) twice, SL1, K7; rep from *, ending last rep with K5.
Row 45: Color A, K6, * SL1, K1, SL1, K9; rep from *, ending last rep with K6.
Row 47: Color B, K7, * SL1, K11; rep from *, ending last rep with K7.
Repeat Rows 1 - 48.
Pin Box - Worked in the round

Mosaic Knitting. 2 Colour Slipped Stitch Pattern. Right side vs wrong side of the Pin Box stitch.