Ch even number.
Row 1: Starting in the 2nd chain from hook, *1sl st, 1hdc into each of next 2 sts. Repeat from * across the row. The last stitch will be a sl st. Ch 1, turn.
Row 2: *1 sl st into top of slst of the previous row. 1 hdc into top of next hdc. Repeat from * across the row. The last stitch will be a slst. Ch 1, turn.
Repeat Row 2 until you reach your desired length.