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| (Compiled with Asymptote version 2.14svn-r5318) |
//Translate from http://zoonek.free.fr/LaTeX/Metapost/metapost.html
size(6cm,0);
path a,b,c,d;
a = (-1,-.2){up} .. tension 1.2 .. (1,-.2){down};
transform r90=rotate(90);
b = r90*a;
c = r90*b;
d = r90*c;
path bound=buildcycle(a,b,c,d);
fill(bound, lightgrey);
draw(a^^b^^c^^d,grey);
draw(bound);
