______
+----------------+           / More \  No       +----------+
| Initialization | -------> <  Data  > -------> | Clean Up |
+----------------+    ^      \   ?  /           +----------+
                      |       +--+-+
                      |          | Yes
                      |          |
                      |          V
                      |     +---------+
                      +-----+ Process |
                            +---------+