jwz wrote a document explaining why this is hard. (Note that this link may result in an unsavoury redirect if you click on it from here. You can, e.g. copy an

jwz wrote a document explaining why this is hard. (Note that this link may result in an unsavoury redirect if you click on it from here. You can, e.g. copy and paste it to avoid this.) https://www.jwz.org/xscreensaver/toolkits.html https://www.jwz.org/xscreensaver/toolkits.html