size(200, 200);
  noStroke();
  background(0);
  
  // Load an image from the data directory
  PImage c;
  c = loadImage("cait.jpg");
  
  int xoff = 0;
  int yoff = 0;
  int p = 2;
  int pix = p*3;
  
  for(int i = 0; i < c.width*c.height; i += 1) 
  {  
    int here = c.pixels[i];
    
    fill(red(here), 0, 0);
    rect(xoff, yoff, p, pix);
    
    fill(0, green(here), 0);
    rect(xoff+p, yoff, p, pix);
    
    fill(0, 0, blue(here));
    rect(xoff+p*2, yoff, p, pix);
    
    xoff+=pix;
    if(xoff >= width-pix) {
      xoff = 0;
      yoff += pix;
    }
  }