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path: root/Build/source/utils/asymptote/examples/ring.asy
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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);