for(scalar_t u = 0; u < belly_radius; u += thickness / 2) {
image->draw_ellipse(thickness, r, g, b, _belly_xc, _belly_yc, u, u, 0);
}
for(scalar_t u = 0; u < belly_radius; u += thickness / 2) {
image->draw_ellipse(thickness, r, g, b, _belly_xc, _belly_yc, u, u, 0);
}