The Peacock's Tail stutch look so much more impressive than Old Shale stitch

Knitted in a multiple of 9 sts anh a 6-row repeat.
Row 1: * K1, (yo, k1) 8 times; repeat from * to end.
Row 2: * P1, k15, p1; repeat from * to end.
Row 3: * K1, k2tog, k11, ssk, k1; repeat from * to end.
Row 4: * P1, p2tog-b, p9, p2tog, p1; repeat from * to end.
Row 5: * K1, k2tog, k7, ssk, k1; repeat from * to end.
Row 6: * P1, p2tog-b, p5, p2tog, p1; repeat from * to end.

Knitting abbreviations:
K: Knit | P: Purl | Yo: Yarn over | K2tog: Knit 2 sts together | Ssk: Slip slip knit.
P2tog: Purl 2 sts together  |  P2tog-b: Purl 2 sts together through the back loops