* demonstrating use of =#+srcname:= with =#+resname:=

#+srcname: circles
#+begin_src asymptote :file circles.png
  import graph;
  
  size(0,4cm);
  
  real f(real t) {return cos(t);}
  
  path g=polargraph(f,0,2pi,operator ..)--cycle;
  filldraw(g,pink);
  
  for(int i=0; i < 8; ++i) {
    real j = 0.125 + 0.125*i;
    real h(real t) {return j;};
    path k=polargraph(h, -(acos(j)), acos(j), operator ..);
    draw(k,blue);
  }
  
  xaxis("$x$",above=true);
  yaxis("$y$",above=true);
  
  dot("$(pi,0)$",(1,0),N);
#+end_src

** a sub-header
sub-stuff

** another sub-header

and finally the results

#+resname: circles