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  1. or download this
    sub enum {
        local($_)=@_;
    ...
            }
        }
    }
    
  2. or download this
    &enum(<<'EOL');
       $RED, $GREEN, $BLUE, $CYAN='a', $MAGENTA, $YELLOW,
       $BLACK=-1
    EOL
    print "$RED $GREEN $BLUE $CYAN $MAGENTA $YELLOW $BLACK\n";