function copyPixel(x1, y1, x2, y2){
    pixelSetter(x1, y1, [oldPixels.get(x2, y2, 0), oldPixels.get(x2, y2, 1), oldPixels.get(x2, y2, 2), oldPixels.get(x2, y2, 3)], pixels);
    
  }