graph LR
Start
subgraph Processing
    A --> B
    B --> C
end
subgraph Storage
    D
    E
end
Start --> A
C --> D
C --> E
D --> End
E --> End
End
---
            +---------------------------+ +-------+          
            |        Processing         | |Storage|          
            |                           | |       |          
            |                           | |       |          
+-------+   | +---+     +---+     +---+ | | +---+ |   +-----+
|       |   | |   |     |   |     |   | | | |   | |   |     |
| Start |---->| A |---->| B |---->| C |---->| D |---->| End |
|       |   | |   |     |   |     |   | | | |   | |   |     |
+-------+   | +---+     +---+     +---+ | | +---+ |   +-----+
            |                       |   | |       |      ^   
            +-----------------------|---+ |       |      |   
                                    |     |       |      |   
                                    |     |       |      |   
                                    |     |       |      |   
                                    |     | +---+ |      |   
                                    |     | |   | |      |   
                                    +------>| E |--------+   
                                          | |   | |          
                                          | +---+ |          
                                          |       |          
                                          +-------+          
