Use 2 balls at a time such that the scarf knits up in three parts, basically. (Total of 4 balls)
43 sts across and ribbed pattern (1 knit, 1 purl) with size 7 needles.
Change yarn after every two rows.
Knit until you run out of yarn!

This gorgeous pattern was shown to me by Sallan of Apple Valley Yarns Company, Midland, MI. Will post picture when complete.