Pin Box 🧶 Mosaic Knitting

Pin Box colour slip-stitch knitting. It looks complicated but is not difficult.

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