2. H crochet hook
Row 1: Chain (ch) 18
Row 2: In second ch from hook double crochet (DC) to end (16 DC)
Row 3: Turn, ch 2, DC to end of row (16 DC)
Row 4-145(or how ever long you'd like)
It sounds like a lot of rows, but it goes fast.
Tie it into a bow:
I used this video to tie this bow.
Or you can use it like a regular scarf: