This isn't a blanket pattern but it is a ripple stitch pattern worked with purl stitches. You could practice it to see how it works for you and then use the practice piece as a gauge swatch to determine how many repeats you'd want for the width of your blanket. I think it would make a very nice baby blanket.
ETA: Oops! You were looking for chevron patterns, I've learned to call them ripples, they're the same thing, you might even find them call zig zags. Whatever name you use, it's a pretty pattern, good for boys or girls. Enjoy!