Pastel to spider = 25% Bumblebee, 25% Spider, 25% Pastel, 25% Normal

Killer bee = A super pastel spider, so either by breeding two bumblebees or by breeding a spider to a superpastel, or a bumblebe to a pastel, or by breeding a killer bee to a normal and hoping, or to a pastel.

Pastel x Pastel = 25% Super pastel, 50% pastel, 25% normal

You must breed a spider to a normal in order to get a spider.