The e e cummings poem "the Cambridge ladies who live in furnished souls" mocks the titular ladies for their small-minded domesticity. The last four lines read:
.... the Cambridge ladies do not care, above
Cambridge if sometimes in its box of
sky lavender and cornerless, the
moon rattles like a fragment of angry candy
I believe I understand the main point here: the Cambridge ladies are too wrapped up in their gossip and knitting to care about anything else, even something as significant as the sky and the moon; such things are "above" their notice. What I don't understand is why the moon is said "sometimes" to "rattle like a fragment of angry candy."
What occasions does cummings mean by "sometimes"? How does the moon "rattle"? And why is it "angry"?