20               Zuul                           Git                            
 
                                                                               
 
                                          Nova        Keystone                 
 
                                          ■badbeef    ■beefcab                 
 
                                          ■#1                                  
 
                                          ■#3                                  
 
                                                                               
 
                                                                               
 
                                                                               
 
                                                                               
 
                                                                               
 
                                                                               
 
                                                                               
 
                                                                               
 
                                                                               
 
                                                                               
 
     ┌───┐                                                                     
 
     │▐█▌│ Nova #4      SUCCESS                                                
 
     └───┘              SUCCESS                                                
 
                        SUCCESS                                                
 
                        SUCCESS                              .