So I went with some silverware. I really like the shapes they make both negative and positive. However, one of the problems with painting something so rigid is first you have to get your drawing right and then you have to worry about it being too tight and stiff. So here it is - at the end I violated a few of the boundaries bringing the background color into the object. It was an optical illusion that was actually visible but of course I exaggerated it a bit.