$blogs = [ # blog list
  [ # first blog
    blog,
    2,
    [ # replies structure
      [ # first reply
        reply,
        0,
        undef, # no replies
      ], 
      [ # second reply
        reply,
        1,
        [ # replies structure
          [ # first reply 
            reply,
            0,
            undef, # no replies
          ]
        ]
      ], 
    ],
  ], # end of first blog
  [  # second blog
    ...
  ],
]; # end of blog list