path: root/Master/texmf/doc/asymptote/examples/ring.asy

size(0,100);
path unitcircle=E..N..W..S..cycle;
path g=scale(2)*unitcircle;
label("$a \le r \le b$");
radialshade(unitcircle^^g,yellow+evenodd,(0,0),1.0,yellow+brown,(0,0),2);