A brioche tree pattern, reversible outlook.

Knit on RS, Purl on WS
K
Purl on RS, Knit on WS
P
Slip 1 yarn over
Sl1yo
Yarn Over
Yo
Yarn in front
YF
Knit the stitch that was slipped in the previous row together with its yarn over
brk
Purl the stitch that was slipped in the previous row together with its yarn over
brp
Brioche 2 stitches Increase
brkyobrk
Brioche 2 stitches Right Slant decrease
brRsl dec
Brioche 2 stitches left Slant decrease
brLsl dec
Slip
S
Brioche 4 stitches decrease
Br4 dec