This one's f/10 and 3 minutes. For some reason ISO isn't in the metadata though (at least not in Right Click -> Properties -> Details, although I'm sure there's a better way), so I don't know what is was... probably 100 or 200. Basically if you don't want to appear, you need a long exposure relative to the time you're actually drawing and dark clothes also help. If you're doing it right, you'll look like a bank robber. On the night I took this one I actually went back home to change from white to dark shoes.
Looked up your camera, you'll probably want to stick it in manual, 60 seconds, f/8 and ISO 80. If the background is too dark, bigger aperature (f/smaller) or higher ISO. Too bright, you'll need to cut down shutter speed and draw fast!