public class ScacchieraWhile {

    public static void main(String[] args) {

	int i = 1; // contatore

	System.out.println("+--+--+--+--+");

	while (i<=4) {
	    System.out.println("|  |  |  |  |");
	    System.out.println("+--+--+--+--+");
	    i++; // IMPORTANTE!
	}
    }
}