%Lutz Ádám CSJ456
%concentric


t = linspace(0, 2*pi, 500);
thick = 10;
k =0;
figure
hold on;
asd = colormap(jet(5));

for i=1:5
    plot(i*cos(t),i*sin(t),'LineWidth',thick - k,'Color',asd(i,:))
    k = k+2;
end
xlim([-6 6])
ylim([-6 6])