else if ((y+spacing/2) % spacing == 0 && xa % 2 != 0)
} else if ((y+spacing/2) % spacing == 0 && xa % 2 != 0) {
  makeAlternator(int fgColor, int bgColor, int spacing) {     int w = imageWidth_;    int h = imageHeight_;    int pix[] = new int[w*h];     int index, y,x;     index = 0;    int band = 16;    for (y=0; y<h; y++) {      int xa = 0;      for (x=0; x<w; x++) {	if (x > xa*band) xa++;	if (y % spacing == 0 && xa % 2 == 0)	  pix[index++] = fgColor;	else if ((y+spacing/2) % spacing == 0 && xa % 2 != 0)	  pix[index++] = fgColor;	else	  pix[index++] = bgColor;      }    }    MemoryImageSource mi = new MemoryImageSource(w, h, pix, 0, w);    Image image = tk_.createImage(mi);    return image;  }