I did these this past semester in ball point pen. All 10 of these were done during classes that bored me to death. As you can see, I was bored often. I originally planned on doing 12, then aligning them 4x3, and drawing something over them in white charcoal, but I don't feel like doing that anymore. Not much else to say about them, enjoy.
https://s302.photobucket.com/albums/nn89/Mise2/