This is a pattern that was handed out free at Mass Ave. Knit Shop. I took a photo because the print copies were all gone.
Three balls of cotton (300 yards or so).
Needles: Size 7 or 8
Cast on 22 stitches.
Row 1: Knit
Row 2: K 8, turn and knit back.
Row 3: K 6, turn and knit back.
Row 4: K 4, turn and knit back.
Repeat 4 rows to desired length, ending with Row 4. Bind Off.