#include <SFML/Graphics.hpp>

int main()
{
    sf::RenderWindow window(sf::VideoMode(800, 600), "Progress Bar");

    sf::RectangleShape progressBar(sf::Vector2f(400, 50));
    progressBar.setFillColor(sf::Color::Green);
    progressBar.setPosition(200, 300);

    float progress = 0.0f;
    float progressSpeed = 0.01f;

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

        if (progress < 1.0f)
        {
            progress += progressSpeed;
            progressBar.setSize(sf::Vector2f(400 * progress, 50));
        }

        window.clear(sf::Color::White);
        window.draw(progressBar);
        window.display();
    }

    return 0;
}