Hey, funseekers, here's the noob of the day: Meet VEEZLEY.
A word of advice before we get rolling:
Using graph paper for a pattern like this is like missing laundry day and having to wear a bra that's too tight. Honestly. There is no zen to be had there.... don't do it.
Just draw some parallel diagonal lines, and then do some going in the opposite direction. It doesn't have to be perfect. Perfect is boring. Shoot for halfway between perfect and interesting.
Yeah, I wouldn't listen to me, either.
Here's an old cookie decorating trick that will help you draw a decent grid:
Decide how big a slant you want on your first set of diagonal lines and draw one right smack in the middle of the space you want to fill. Then do the same for the lines going in the opposite direction, so you have an X in the middle of your section (like the first square). You will find that it's easier to keep your lines roughly parallel and more equally spaced if you start in the middle and work outward than if you work from one side to the other. Cookies don't lie. At least mine didn't. I still think the store-bought variety are of questionable integrity.
Next, turn your tile 90 degrees and draw a nice swoopy line through each diamond. Make sure you go from one point to the next, drawing sloooowllllyyy. It seems to work better if you draw each 'swoop' individually and don't try to make it one long wavy line.
Then draw a vertical line straight down from the center of each curved line, to the point directly below it.
Here's some stuff you can do with it. Not only did I skip the shading, I'm pretty sure I just plumb forgot to keep drawing when it came to square #3. Sorry 'bout that.
Filling in the negative space in between gives this pattern some punch. This looks better with a slightly bigger grid so you get some white space in between your lines for contrast.
...and a few more variations...
Ha... look what I found in an old photo folder! See??