Brioche in the round

How to knit
SL1 Yof: With working yarn in front, slip the next stitch purl wise, then bring the yarn over the needle (and over the slipped stitch) then back to the front and under the needle in position to purl the following stitch.
Yf SL1 Yo: Bring the working yarn under the needle to the front of the work, slip the next stitch purl wise, then bring the yarn over the needle (and over the slipped stitch) to the back in position to work the following stitch.
Brioche Knit: Knit the stitch (which was slipped in the row before) together with its yarn over.
Brioche Purl: Purl the stitch (which was slipped in the row before) together with its yarn over.

Pattern
Cast on an even number of stitches.
Set up Round: *Knit 1, Yf SL1 Yo,; rep from *.
Round 1: *Yf SL1 Yo, Brioche Knit 1; rep from *.
Round 2: *Brioche Purl 1, SL1 Yof; rep from *.
Repeat Rounds 1 and 2.