Here is the baby blanket I am making, showing front and back. The striping is much more attractive on the front than the back. The back is interesting, but the front presents the look I really wanted. Incidentally, the colors are much brighter and prettier IRL; either the camera or my monitor just is not getting the colors right.
The pattern is very easy: it's just garter stitch. I do 2 rows in each color, so I get a solid ridge of garter in each color. However, there is a twist. I am very lazy about weaving in ends, so I decided I wanted to carry the yarn along the sides of the blanket. But with 4 colors double-stranded, I did not want to carry them all along one side. So I am carrying 2 colors on one side and 2 on the other. When I am using the colors carried on the right side, I knit. When I use the colors I am carrying on the left side (when I am essentially working the piece backwards), I purl. I am using circular needles so I can just flip the piece around and work it from whatever edge I want (although I did put it on straight needles to make it a little easier to take this picture).
So it ends up working like this:
Rows 1 & 2, 5 & 6, 9 & 10 : Using Blush (light pink) from the right edge: Knit.
Rows 3 & 4: Using Violet (purple) from the right edge: Knit.
Rows 7 & 8: Using Cream, starting from the left edge: Purl.
Rows 11 & 12: Using Orchid, starting from the left edge: Purl.
Then you go back to Row 1, and repeat the pattern.
There probably is an easier and better way to do this, but this is what I came up with.
When I am finished, if I really don't like the way the pattern looks on the back, I may end up sewing on a lining to hide it. I will decide when I am finished. If I don't sew on a lining, I will definitely have to do some kind of edging to neaten up the sides. Even carrying only 2 colors per side is looking a bit messy--I am probably carrying the colors along for more rows than the experts would recommend! Oh, well. Hopefully, it will all turn out all right. I love the feel of it.