Slipped Hourglass

Knitted in a multiple of 8 sts + 2 and a 20-row repeat.
All wrong side rows: Knit all knit stitches, slip all purl stitches with yarn in front.
Row 2: K1, * k3, sl 2, k3; rep from * to last st, k1.
Row 3: P1, * p3, k2, p3; rep from * to last st, p1.
Row 4: K1, * k3, sl 2, k3; rep from * to last st, k1.
Row 5: p1, * p2, RS, LS, p2; rep from * to last st, p1.
Row 6: K1, * k2, sl 1, k2, sl 1, k2; rep from * to last st, k1.
Row 7: p1, * p1, RS, p2, LS, p1; rep from * to last st, p1.
Row 8: K1, * k1, sl 1, k4, sl 1, k1; rep from * to last st, k1.
Row 9: p1, * RS, p4, LS; rep from * to last st, p1.
Row 10: K1, * sl 1, k6, sl 1; rep from * to last st, k1.
Row 11: P1, * k1, p6, k1; rep from * to last st, p1.
Row 12: K1, * sl 1, k6, sl 1; rep from * to last st, k1.
Row 13: P1, * k1, p6, k1; rep from * to last st, p1.
Row 14: K1, * sl 1, k6, sl 1; rep from * to last st, k1.
Row 15: p1, * LS, p4, RS; rep from * to last st, p1.
Row 16: K1, * k1, sl 1, k4, sl 1, k1; rep from * to last st, k1.
Row 17: p1, * p1, LS, p2, RS, p1; rep from * to last st, p1.
Row 18: K1, * k2, sl 1, k2, sl 1, k2; rep from * to last st, k1.
Row 19: p1, * p2, LS, RS, p2; rep from * to last st, p1.
Row 20: K1, * k3, sl 2, k3; rep from * to last st, k1.

Knitting abbreviations:
K: Knit | P: Purl  | Sl: Slip stitch with yarn in front.
RS: Right slip
The first way: Slip 1 purl stitch with yarn in back, drop next (knitted) slip stitch off needle to front of work, slip same purl stitch back to the left-hand needle, pick up dropped stitch and knit it, purl 1.
The second way: Skip the first stitch, knit the second stitch, leave on needle, then purl the skipped stitch. Slip both stitches from the needle together
LS: Left slip
The first way: Drop (knitted) slipped stitch off needle to front of work, purl 1, pick up dropped stitch and knit it.
The second way: Skip the first stitch, purl through the backloop the second stitch, then knit the skipped stitch. Slip both stitches from the needle together