Pearl Brioche Pattern

How to knit
YF SL1 YO: Bring working yarn to front under the needle, slip 1 stitch purlwise, bring working yarn over top of needle to the back. This produces a yarn over that crosses over the slipped stitch.
BRK1: Knit the stitch that was slipped in the previous row together with its yarn over. Because the yarn over wasn't counted as a separate stitch on the previous row, no real decrease is made.

Pattern
Cast on even number of stitches.
Row 1 (WS): K2, *YF SL1 YO, K1; rep from * to end.
Row 2 (RS): K1, *BRK1, K1; rep from * to last st, K1.
Row 3: K1, *YF SL1 YO, K1; rep from * to last st, K1.
Row 4: K2, *BRK1, K1; rep from * to end.
Rep Rows 1 -  4.