option1                                                                                                   yes                             
                                                                                                                                                                               
                                                                                                                                                                               
                                                                                                                                                                               
                                                                                                                                                                               
                                                                                                                                                                               
                                                                                                                                               yes                             
                                     option2                                                                                                                                   
                                                                                                                                                                               
                                                                                                                                                                               
                                                                                                                                                                   do something