std::vector<glm::vec2> controlPoints = {
            {.1,  .3},
            {.1,  .3},
            {-.4,  -.4},
            {.1,  -.3},
            {.2,  -.3},
            {.2,  -.4},
            {.11,  -.5}
    };


put this above bezierShape in BezierWindow()
points.emplace_back(glm::vec2{-.15, .3}, 0);