Thanks gals! I decided on stitching just outside the ditch, what's the term for that?????

So far I've done my long diagonal lines and my horizontal line through the middle. It's looking good. I'm not sure if I'll be able to do the smaller triangles as well, maybe after I practice more. I took my first seam out twice!
Joanneg - I used Adobe Ideas, PS Touch works similarly too

I might have paid for those apps but I'm pretty sure there's a free version of PS Touch. I was looking for a line tool but I couldn't find one on either app, but it might be in there somewhere, I was just impatient! Hahaha

If you try it and find that you like it a lot, you might look into getting a nice stylus. My hubby says the Jot Pro Stylus has a fine tip, I want one