// Example 03-14 from "Getting Started with Processing" 
// by Reas & Fry. O'Reilly / Make 2010

size(480, 120);
smooth();
background(0);                // Black
fill(204);                    // Light gray
ellipse(132, 82, 200, 200);   // Light gray circle
fill(153);                    // Medium gray
ellipse(228, -16, 200, 200);  // Medium gray circle
fill(102);                    // Dark gray
ellipse(268, 118, 200, 200);  // Dark gray circle
