private void writeFrame(int[] pixels, int imageWidth, int imageHeight, int imageLeftPosition, int imageTopPosition, int delay, OutputStream os) throws Exception	{	
    	writeFrame(pixels, imageWidth, imageHeight, imageLeftPosition, imageTopPosition, delay, GIFFrame.DISPOSAL_RESTORE_TO_BACKGROUND, GIFFrame.USER_INPUT_NONE, os);
    }
Write out a zero length data sub-block
subs/gif-revert/src/main/java/com/engineer/gif/revert/lib/AnimatedGIFWriter.java