To make a sleeve I would start with simple
(RS) k1 (purl on WS), p1(knit on RS)
After you're done with a sleeve,
we have to count, may be add some stitches.
Anyways, we have to make a sample first.
Row 1 (Wrong Side): * purl(p1), knit(k1); rep. from * to last until you get to desired width of your scarf, p1.
Row 2 (Right Side): Slip 1st as knit,*slip stitch as if to purl alone with a loop, k1*; rep from * to * to the end.
Row 3: Slip 1st as purl, *k1, p1*; rep from * to* to the end.
Repeat Rows 2 and 3 until you get to the point to start another sleeve. Decrease some stitches (as many as we added after first sleeve.
Make another sleeve.
|Right Side in our case|
Sorry, I didn't count number of stitches, it depends on yarn. I would take fine yarn since this pattern turns out really thick.