STUPID FRACTALS GRR

#include <SFML/Graphics.hpp>
#include <SFML/Window.hpp>
#include <algorithm>
#include <iostream>
#include <vector>

int main() {
    sf::Font font;
    if (!font.loadFromFile("Hack-regular.ttf")) {
        std::cout << "NO FONT";
        return 0;
    }
    sf::VertexArray dots(sf::LineStrip);
    sf::RenderWindow window(sf::VideoMode(1000, 1000), "AA");
    sf::Text left, right;
    left.setFont(font);
    left.setCharacterSize(50);
    left.setFillColor(sf::Color::White);
    left.setPosition(sf::Vector2f(800, 900));
    left.setString("<");
    right.setFont(font);
    right.setCharacterSize(50);
    right.setFillColor(sf::Color::White);
    right.setPosition(sf::Vector2f(860, 900));
    right.setString(">");

    sf::Vector2f sdot1(150, 700);
    sf::Vector2f sdot2(500, 94);
    sf::Vector2f sdot3(850, 700);

    dots.append(sdot1);
    dots.append(sdot2);
    dots.append(sdot3);
    dots.append(sdot1);
    int iteration = 0;

    while (window.isOpen()) {
        sf::Event event;
        while (window.pollEvent(event)) {
            if (event.type == sf::Event::Closed){
                window.close();
            }
            if (event.type == sf::Event::MouseButtonPressed) {
                if (right.getGlobalBounds().contains(sf::Vector2f(event.mouseButton.x, event.mouseButton.y)) && iteration < 7) {
                    sf::VertexArray dotsToReplace(sf::LineStrip);
                    for (int i = 0; i < dots.getVertexCount() - 1; ++i) {
                        dotsToReplace.append(dots[i]);
                        sf::Vector2f edge(dots[i + 1].position - dots[i].position);
                        sf::Vector2f perpend(edge.y, -edge.x);
                        perpend.x /= 3.0;
                        perpend.y /= 3.0;
                        sf::Vector2f cent(float((dots[i].position.x + dots[i + 1].position.x) / 2.0),
                            float((dots[i].position.y + dots[i + 1].position.y) / 2.0));
                        sf::Vector2f dot1(dots[i].position + sf::Vector2f(edge.x / 3.0, edge.y / 3.0));
                        sf::Vector2f dot2 = cent + perpend;
                        sf::Vector2f dot3(dots[i].position + sf::Vector2f(edge.x * 2 / 3.0, edge.y * 2 / 3));

                        dotsToReplace.append(dot1);
                        dotsToReplace.append(dot2);
                        dotsToReplace.append(dot3);
                    }
                    dotsToReplace.append(dots[dots.getVertexCount() - 1]);

                    /*for (int ind = 0; ind < dotsToReplace.getVertexCount(); ++ind) {
                        dotsToReplace[ind].color = color;
                    }*/
                    dots = dotsToReplace;
                    ++iteration;
                }
                if (left.getGlobalBounds().contains(sf::Vector2f(event.mouseButton.x, event.mouseButton.y)) && iteration > 0) {
                    sf::VertexArray dotsToReplace(sf::LineStrip);
                    for (int i = 0; i < dots.getVertexCount(); i += 4) {
                        dotsToReplace.append(dots[i]);
                    }
                    dots = dotsToReplace;
                    --iteration;
                }
            }


            window.clear(sf::Color::Black);


            window.draw(dots);
            if (iteration > 0) {
                window.draw(left);
            }
            if (iteration < 7) {
                window.draw(right);
            }
            window.display();

        }
    }
}