public static void main(String[] args) {
		int direction = (int) (Math.random() * 5);
		switch (direction) {
		case NORTH:
			System.out.println("travelling north");
			break;
		case SOUTH:
			System.out.println("travelling south");
			break;
		case EAST:
			System.out.println("travelling east");
			break;
		case WEST:
			System.out.println("travelling west");
			break;
		default:
			assert false;
		}
	}