Hello, Im completely clueless about butterflies. I have a cocoon (don't no if thats the right word or not) in my back garden, it has been there for about 2 weeks. when i first noticed it, it was just a green blob, within a few days it started to get pointy and darker around the edges. It has looked the same for over a week now, does it take along time or should it be changing quicker than this? Is there anything i can do to help it?