This pattern has numerous variations. Variegated yarns with long color runs or self-striping yarns are good choices, or introduce stripes from various single color yarns. Decide on the width of the scarf you want to knit, calculate your gauge, multiply the two, and cast on. The quantity of yarn you will need will vary by the width and length. In general, a standard sized scarf of 6 to 8 inches wide and 60 to 72 inches long will use about 400 yards.