During school, I tend to use free time by drawing on a piece of line paper. One of the drawings I've made is this side-view, futuristic/fictional city that popped in my mind. It took me about 3 in-class days of inconsistent working to finish it, I would estimate about 30 minutes if done consistently. Keep in mind that I know the lines going across look ugly, and that I know that it's not the best thing in the whole wide world, but I felt like I put some effort into it so I'm posting it here.
http://i78.photobucket.com/albums/j114/ratty165/art%20stuff/scan0001.jpg[/IMG]