I put stitch markers of one color on pegs 5, 15, 25, etc. and stitch markers of another color on pegs 10, 20, 30, etc. I e-wrapped all pegs except those with the first color stitch marker; those got purled. After eight rows, I switched and only purled those pegs with the second color stitch marker. You can make the textured bars be closer or further apart by adjusting which pegs get stitch markers, and longer or shorter by adjusting the number of rows. For variety, you can knit a row or two with purl stitches on all marked pegs, or have a row or two in between switch-offs where you don't purl any pegs. The above sample is part of an afghan strip, which I think is a good application for this stitch.