Press 1, 2, 3, . . . ,9, 0 to see ten pictures, each consisting of 1000 lines. Use Turbo or not. I was curious to see how the picture changes when I make a simple change in the curves: just changing the size of the curves. If you compare pictures 1 and 2, you can see this. The same goes for 3 and 4, 5 and 6, 7 and 8, 9 and 0.
How the pictures are drawn: 1000 points on a curve are pairwise connected to 1000 points on another curve by lines. For beautiful advanced examples of using this technique, take a look at http://www.ams.org/publicoutreach/math-imagery/yeganeh