function liss (A, B, a, b, sgm)
    figure();
    hold on;
    t = [0:0.01 * pi:2 * pi];
    for i = [1:length(A)]
        plot(A(i) * sin(a(i) * t + sgm(i)), B(i) * sin(b(i) * t), 'Linewidth', 2);
    end
end