Sorting animation for processing (Java)

sorting-animation.pde

#insert filename of any image
String fname = "../sample-images/earth.jpg";
#insert width and height of image
int imgWidth = 256;
int imgHeight = 256;
PImage img;

void settings() {
  size(imgWidth, imgHeight);
}
void setup() {
  colorMode(HSB, 255);
  img = loadImage(fname);
  img.loadPixels();
  frameRate(100);
}

int cnt = 1;
int steps = 1;
void draw() {
  //if (frameCount % 1000 == 0) {
  background(img);
  //}
  if (frameCount < imgWidth) {
    for (int y = 0; y < imgHeight; ++y) {
      for (int pos = y*imgWidth + frameCount; 
        pos % imgWidth != 0 && saturation(img.pixels[pos - 1]) > saturation(img.pixels[pos]); 
        --pos) {
        //swap pos - 1 and pos
        int tmp = img.pixels[pos - 1];
        img.pixels[pos - 1] = img.pixels[pos];
        img.pixels[pos] = tmp;
      }
    }
    if(frameCount % 8 == 1) {
      String name2 = (new Integer(512 - frameCount )).toString();
      saveFrame("output/###.jpg");
      saveFrame("output/" + name2 + ".jpg");
    }
  }
}