"Out damned spot, out, I say! One. Two. Why then, 'tis the time to do 't. Hell is murky."
an imagined interlocutor, Macbeth "Fie, my lord, fie, a soldier, and afeard?" What are you afraid of, big man? Just do it. (She’s now afraid of everything.) the ironic desperation to replay the moments of where she was once in control, on repeat, over and over display perhaps her own symptoms of the utter lack of control over not just macbeth but her own self in the deprecation of her mind. The free verse is a clear mirroring of this.