Use of forest/tree&box, how can I get result as attached picture,use forest drawing table

This is a supplement to Zarko's answer which avoids hard-coding so many dimensions. Although the code is a bit more complex, the result is more flexible in that it is easier to extend and/or adapt the tree e.g. by adding additional layers or nodes with multi-line texts.

\documentclass[tikz,border=10pt,multi]{standalone}
\usepackage{forest}
\usetikzlibrary{backgrounds}
% modified from Zarko's answer at https://tex.stackexchange.com/a/314181/
\begin{document}

\tikzset{
  L0/.style={fill=green},
  L1/.style={fill=orange},
  L2/.style={fill=yellow},
  L3/.style={fill=pink},
  basic/.style={line width=1pt, draw=white},
}

\begin{forest}
  for tree={
    grow'=0,
    parent anchor=children,
    child anchor=parent,
    edge path={none},
    minimum width=15mm,
    l sep=0pt,
    s sep=0pt,
    if n children=0{
      minimum height=8mm,
    }{},
  },
  before drawing tree={
    where n children=0{
      tikz+/.wrap pgfmath arg={
        \scoped[on background layer]{\path [L#1, basic] (.north west) rectangle (.south east);}
      }{level()},
    }{
      tikz+/.wrap pgfmath arg={
        \scoped[on background layer]{\path [L#1, basic] (.west |- !L.south) rectangle (.east |- !F.north);}
      }{level()},
    }
  }
  [AAAA
    [EEEE, minimum height=32mm
        [EEEE
            [YYYY]
            [AAAA]
        ]
        [DDDD
            [DDDD]
            [KKKK]
        ]
    ]
    [OOOO
        [PPPP
            [KKKK]
            [KKKK]
        ]
    ]
  ]
\end{forest}
\end{document}

Something like this:

I still in phase of learning forest, so there should be more elegant solution ...

\documentclass[border=3mm]{standalone}
\usepackage{forest}

\begin{document}

\forestset{
    line width=1pt,
  L1/.style={fill=green,minimum height=48mm,yshift=4mm},
  L2/.style={fill=orange,minimum height=16mm},
  L3/.style={fill=yellow,minimum height=16mm},
  L4/.style={fill=pink,minimum height=8mm},
}

\begin{forest}
    for tree={
        grow=0,reversed, % tree direction
        parent anchor=east,child anchor=west, % edge anchors
    edge path={none},
        minimum width=15mm, draw=white,outer sep=0pt,% node shape
        l sep=0mm, % level distance
        s sep=0mm % level distance
    }
  [AAAA,L1
    [EEEE,L2,minimum height=32mm
        [EEEE,L3
            [YYYY,L4][AAAA,L4]
        ]
        [DDDD,L3
            [DDDD,L4][KKKK,L4]
        ]
    ]
    [OOOO,L2
        [PPPP,L3
            [KKKK,L4][KKKK,L4]
        ] 
    ]   
  ]
\end{forest}
\end{document}

I change the tree as it was determined in MWE so, that is more likely to provided image.