/** * Background Image.  *  * This example presents the fastest way to load a background image * into Processing. To load an image as the background, it must be * the same width and height as the program. */ PImage bg;int a; void setup() {  size(200,200);  frameRate(30);  // The background image must be the same size as the parameters  // into the size() method. In this program, the size of "milan_rubbish.jpg"  // is 200 x 200 pixels.  bg = loadImage("milan_rubbish.jpg");}void draw() {  background(bg);  a = (a + 1)%(width+32);  stroke(226, 204, 0);  line(0, a, width, a-26);  line(0, a-6, width, a-32);}