Works on any number of stitches.
Row 1: Knit.
Row 2: Knit each stitch, wrapping the yarn around the needle twice instead of once when completing the stitch
Row 3: Knit each stitch, dropping the extra wrap off the needle as you complete each stitch.
Repeat these three rows for pattern.
You can also make dropped stitches on purl rows or wrap the yarn around the needle three or more times to make really long drops.