Code

/*#include <iostream>
#include <SFML/Graphics.hpp>

using namespace std;

int main()
{
    sf::RenderWindow window(sf::VideoMode(1712, 963), "Dad's Birthday gift");

    sf::Texture cake;
    sf::Texture balloon;
    sf::Texture balloon2;
    sf::Texture balloon3;
    sf::Texture balloon4;

    cake.loadFromFile("cake.jpg");
    balloon.loadFromFile("balloon.jpg");
    balloon2.loadFromFile("balloon2.jpg");
    balloon3.loadFromFile("balloon3.jpg");
    balloon4.loadFromFile("balloon4.jpg");

    sf::Sprite cakeSprite(cake);
    sf::Sprite balloonSprite(balloon);
    sf::Sprite balloon2Sprite(balloon2);
    sf::Sprite balloon3Sprite(balloon3);
    sf::Sprite balloon4Sprite(balloon4);

    cakeSprite.setPosition(sf::Vector2f(776, 608));
    balloonSprite.setPosition(sf::Vector2f(1451, 303));
    balloon2Sprite.setPosition(sf::Vector2f(261, 671));
    balloon3Sprite.setPosition(sf::Vector2f(1451, 671));
    balloon4Sprite.setPosition(sf::Vector2f(261, 303));

    sf::Font arial;
    sf::Text text;
    sf::Text text2;

    arial.loadFromFile("ARIALBD.TTF");
    text.setFont(arial);
    text2.setFont(arial);

    text.setString("Happy Birthday");
    text2.setString("Dad!");

    text.setCharacterSize(150);
    text2.setCharacterSize(150);

    text.setFillColor(sf::Color::Black);
    text2.setFillColor(sf::Color::Black);

    text.setPosition(360, 103);
    text2.setPosition(710, 353);

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

        window.clear(sf::Color(255, 255, 255));

        window.draw(cakeSprite);
        window.draw(balloonSprite);
        window.draw(balloon2Sprite);
        window.draw(balloon3Sprite);
        window.draw(balloon4Sprite);
        window.draw(text);
        window.draw(text2);

        window.display();
    }
}*/

#include <iostream>
#include <SFML/Graphics.hpp>

using namespace std;

int main()
{
    sf::RenderWindow window(sf::VideoMode(1712, 963), "Dad's Birthday gift");

    sf::Texture cake;
    sf::Texture balloon;
    sf::Texture balloon2;
    sf::Texture balloon3;
    sf::Texture balloon4;
    sf::Texture active;

    cake.loadFromFile("cake.jpg");
    balloon.loadFromFile("balloon.jpg");
    balloon2.loadFromFile("balloon2.jpg");
    balloon3.loadFromFile("balloon3.jpg");
    balloon4.loadFromFile("balloon4.jpg");

    sf::Sprite cakeSprite(cake);
    sf::Sprite balloonSprite(balloon);
    sf::Sprite balloon2Sprite(balloon2);
    sf::Sprite balloon3Sprite(balloon3);
    sf::Sprite balloon4Sprite(balloon4);
    sf::Sprite* activeSprite = &balloon4Sprite;

    cakeSprite.setPosition(sf::Vector2f(776, 608));
    balloonSprite.setPosition(sf::Vector2f(1451, 303));
    balloon2Sprite.setPosition(sf::Vector2f(261, 671));
    balloon3Sprite.setPosition(sf::Vector2f(1451, 671));
    balloon4Sprite.setPosition(sf::Vector2f(261, 303));

    sf::Font arial;
    sf::Text text;
    sf::Text text2;

    arial.loadFromFile("ARIALBD.TTF");
    text.setFont(arial);
    text2.setFont(arial);

    text.setString("Happy Birthday");
    text2.setString("Dad!");

    text.setCharacterSize(150);
    text2.setCharacterSize(150);

    text.setFillColor(sf::Color::Black);
    text2.setFillColor(sf::Color::Black);

    text.setPosition(360, 103);
    text2.setPosition(710, 353);

    sf::Clock clock;

    sf::Time elapsed = clock.getElapsedTime();

    if (elapsed.asSeconds() <= 1){

            while (window.isOpen()) {


                activeSprite = (activeSprite == &balloon4Sprite ?
                    &balloon2Sprite :
                    &balloon4Sprite);

        }
    }

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

        window.clear(sf::Color(255, 255, 255));

        window.draw(cakeSprite);
        window.draw(balloonSprite);
        window.draw(balloon3Sprite);
        window.draw(*activeSprite);
        window.draw(text);
        window.draw(text2);

        window.display();
    }
}