Row 1: k across
Row 2: k1, *yo, k2tog; rep from * to end across
Rep rows 1 and 2 until your scarf is the desired length.
BO after a row 1, and weave in all remaining ends. This is a little tricky with the lacy pattern, but I've found that weaving it through the sort of vertical stripes the lace makes works pretty well.
My finished scarf is 16" wide and 64" from end to end. I love the parallelogram shape the scarf makes, being worked up on the bias. The ends form nice triangular shapes with this stitch, making the scarf look flowy and smooth and not boxy at the ends.