1load("docdraw.mac");
2
3docdraw3d("figures/draw_implicit2",
4	color=blue,
5	implicit((x^2+y^2+z^2-1)*(x^2+(y-1.5)^2+z^2-0.5)=0.015,
6	x,-1,1,y,-1.2,2.3,z,-1,1),
7	surface_hide=true);