Using US 8 knitting needles, 18 stitches and 24 rows = 4 inches in stockinette stitch.
Row 1 (RS): With Color A, cast on 150 stitches.
Row 2 (WS): Purl across all stitches.
Rows 3-12: Repeat Rows 1 and 2 with Colors B through G, alternating colors.
Rows 13-24: Repeat Rows 1 and 2 with Colors A through G, alternating colors.
Repeat Rows 3-24: Continue repeating Rows 3-24 until blanket reaches desired length, ending on Rows 19-24.
Bind off: On the last row, bind off all stitches in pattern.
Weave in any loose ends using a tapestry needle. Block if desired.