H hook, worsted weight COTTON yarn in 2 complimentary or contrasting colors
Note, sometimes you'll work into the chain up at row's end, sometimes not.
Using 2 strands together of Main color 1, chain 16
Row 1: 1hdc in 2nd ch from hook, 2hdc in next ch, 1hdc in each ch across until 2 chains remain; 2hdc in next ch, 1 hdc in last. [17 hdc total] ch 2, turn