Dear ROOTers,
in order to be specific, this is a simple example of what I want to achieve (done using GIMP):

But I can’t find an easy way of doing it with ROOT. I can either have all circles in gray:

using this code: circle_with_holes.C (1.2 KB)
or all circles transparent (no fill):

using this code: circle_with_holes_transparent.C (1.2 KB)
Regards,
mapaz