foo as starting label                                                                                                                                                                                                                                                                                  
                                                                                                                                                                                                                                                                                                                                           
                                                                                                                                                                                                                                                                                                                                           
                                                                                                                                                                                                                                                                                                                                           
                                                                                                                                                                                                                                                                                                                                           
                                                                                                                                                                                                                                                                                                                                           
                                                                                                                                                                                                                                                                                                                                           
                                                                                                                                                                                                                                                                                                                                           
                                                                                     read data                                                                                                                                                                                                                                             
                                                                                                                                                                                                                                                                                                                                           
                                                                                                                                                                                                                                                                                                                                           
                                                                                                                                                                                                                                                                                                                                           
                                                                                                                                                                                                                                                                                                                           This is backward
                                                                                                                                                                                                                                                                                                                                           
                                                                                                                                                                                                                                                                                                                                           
                                                                                                                                                                                                                                                                                                                                           
                                                                                                                                                                                                                                                                                                                                           
                                                                                                                                                                                                                                                                                                                                           
                                                         generate diagrams                                                                                                                                                                                                                                                                 
                                                                                                                                                                                                                                                                                                                                           
                                                                                                                                                                                                                                                                                                                                           
                                                                                                                                                                                                                                                                                                                                           
                                                                                                                                                                                                                                                                                                                                           
                                                                                                                                                                                                                                                                                                                                           
                                                                                                                                                                                                                                                                                                                                           
                                                                                     more data?                                                                                                                                                                                                                                            
                                                                                                                                                                                                                                                                                                                                           
                                                                                                                                                                                                                                                                                                                                           
                                                                                                                                                                                                                                                                                                                                           
                                                                                                                                                                                                                                                        yes                                                                                
                                                                                                                                                                                                                                                                                                                                           
                                                                       Is daytime?                                                                                                                                                                                                                                                         
                                                                                                                                                                                                                                                                                                                                           
                                                                                                                                                                                                                                                                                                                                           
                                                                                                                                                                                                                                                                                                                                           
                                                                                                                                                               no                                                                                                                                                                          
                                                                                                                                                                                                                                                                                                                                           
                                                                                                                                                                                                                                                                                                                                           
                                                                                                                                                                                                                                                                                                                                           
                                                                                                                                                                                                                                                                                                                                           
                                                        Go To Sleep