Since I didn't really know what to do, I just sort of winged it like usual! Sometimes when I can't work a pattern out well enough in my head, I just go for it. I chose some blues and just ran with it!
I'm not exactly crazy about how they turned out. I suppose it looks like plaid, but the lines don't really go over and under each other like most plaid. It's a little hard to do with paint, so I just layered each color on top of the other.
I started with two coats of Deborah Lippmann Let's Hear it for the Boy. I then started with the lighted color I wanted to use for my lines, which was white. I went from lightest to darkest so it would be easier to cover up the colors underneath. White doesn't cover black very well otherwise!
I then layered the darker blue lines, and then the black lines. I placed them pretty randomly since I didn't want each nail to look exactly like the other. Looking at them now, I think I should have made them match a bit more though. Something just seems a bit off about them!
I ended with one coat of Seche Vite on top. I waited for the black lines to dry a bit before using it to prevent smearing of the lines. It still happened a tiny bit on the index finger though. I suppose they look a bit like plaid, but next time I'll try to overlap the lines properly!