public static void main(String[] args) {
        int size = 8;
        String startColor = "X";
        for (int i = 0; i < size; i++) {
            String color = startColor;
            for (int j = 0; j < size; j++) {
                System.out.print(color + " ");
                if (color.equals("O")) {
                    color = "X";
                } else {
                    color = "O";
                }
            }
            if (startColor.equals("O")) {
                startColor = "X";
            } else {
                startColor = "O";
            }
            System.out.println();
        }
    }