sf::RenderWindow window(sf::VideoMode(800, 600), "SFML works!");

    sf::Vertex hLine[] =
    {
        sf::Vertex(sf::Vector2f(0, 0)),
        sf::Vertex(sf::Vector2f(150, 0))
    };

    sf::Vertex vLine[] =
    {
        sf::Vertex(sf::Vector2f(0, 0)),
        sf::Vertex(sf::Vector2f(0, 150))
    };

    while (window.isOpen())
    {
        sf::Event event;
        while (window.pollEvent(event))
        {
            if (event.type == sf::Event::Closed)
                window.close();
        }

        window.clear();
        window.draw(hLine, 2, sf::Lines);
        window.draw(vLine, 2, sf::Lines);
        window.display();
    }