The thing that I find interesting is the central axis. Does anyone believe that God did not know that Adam had sinned when He was walking in the garden in the cool of the day? Of course He knew. And He called to him.
God does not hide Himself from us when we sin; we hide ourselves from Him. But He calls us, is always calling us, to repentance and back to fellowship with Him.
This is why I love doing chiastic structures!
(If chiastic structures are new to you, you might find the teaching tools of scripture helpful.)