read data                                                                                                                               
                                                                                                                                                                                              
                                                                                                                                                                                              
                                                                                                                                                                                              
                                                                                                                                                                                              
                                                                                                                                                                                              
                          generate diagrams                                                                                                                                                   
                                                                                                                                                                                              
                                                                                                                                                                                              
                                                                                                                                                                                              
                                                      more data?                                                                                                                -[#blue]-> yes