The scarf is a variation of a feather and fan pattern. If I give an instruction that is incomprehensible, post a comment and I'll try to clear things up. I'm going to put up the instructions for the pattern and not the scarf which is just five side by side iterations of the pattern.
k# - knit specified number of stitches
p# - purl specified number of stitches
k2tog - knit two together
yo - yarn over
R - Randmacshe (first / last stitch)
NOTE: The feather and fan pattern is worked over 17 + 2 stitches. This means the pattern covers 17 stitches plus one beginning stitch and one ending stitch. In German, the first and last stitches are called Randmaschen and that is how I always think of them. The Randmaschen are never part of the pattern.
Row 1: R, * p17 *, R
Row 2: R, * k17 *, R
Row 3: R, * k17 *, R
Row 4: R, * k2tog, k2tog, k2tog, yo, K1, yo, K1, yo, k1, yo, k1, yo, k1, yo, k2tog, k2tog, k2tog *, R
This completes the 4 rows that make up one iteration of the feather and fan pattern. The asterisks (*) in the pattern rows indicate the 17 stitches of the pattern.