test foreach
    
      
        log
        
          
            
          
        
        
          
            x
            
              
                
                
                  
                    a
                  
                
                
                  
                    b
                  
                
                
                  
                    c
                  
                
              
            
            
              
                log
                
                  
                    x
                  
                
              
            
            
              
                
                   
                     for loop
                   
                 
                
                  
                    log
                  
                
                
                  
                    abc
                  
                
              
            
          
        
      
    
  
  
    
    test while
    
      
        WHILE
        
          
            FALSE
          
        
        
          
             while 0
          
        
        
          
            UNTIL
            
              
                TRUE
              
            
            
              
                 until 0
              
            
            
              
                count
                
                  
                    1
                  
                
                
                  
                    WHILE
                    
                      
                        NEQ
                        
                          
                            count
                          
                        
                        
                          
                            10
                          
                        
                      
                    
                    
                      
                        count
                        
                          
                            1
                          
                        
                      
                    
                    
                      
                        
                           
                             while 10
                           
                         
                        
                          
                            count
                          
                        
                        
                          
                            10
                          
                        
                        
                          
                            count
                            
                              
                                1
                              
                            
                            
                              
                                UNTIL
                                
                                  
                                    EQ
                                    
                                      
                                        count
                                      
                                    
                                    
                                      
                                        10
                                      
                                    
                                  
                                
                                
                                  
                                    count
                                    
                                      
                                        1
                                      
                                    
                                  
                                
                                
                                  
                                    
                                       
                                         until 10
                                       
                                     
                                    
                                      
                                        count
                                      
                                    
                                    
                                      
                                        10
                                      
                                    
                                  
                                
                              
                            
                          
                        
                      
                    
                  
                
              
            
          
        
      
    
  
  
    
    test repeat
    
      
        count
        
          
            0
          
        
        
          
            
              
                10
              
            
            
              
                count
                
                  
                    1
                  
                
              
            
            
              
                
                   
                     repeat 10
                   
                 
                
                  
                    count
                  
                
                
                  
                    10