documentclass{beamer}
setbeamertemplate{navigation symbols}{}% to suppresses (hide) navigation symbols bar
usepackage{tikz}
usepackage{verbatim}
% Three counters
newcounter{x}
newcounter{y}
newcounter{z}
% The angles of x,y,z-axes
newcommandxaxis{210}
newcommandyaxis{-30}
newcommandzaxis{90}
% The top side of a cube
newcommandtopside[3]{
  fill[fill=yellow, draw=black,shift={(xaxis:#1)},shift={(yaxis:#2)},
  shift={(zaxis:#3)}] (0,0) -- (30:1) -- (0,1) --(150:1)--(0,0);
}
% The left side of a cube
newcommandleftside[3]{
  fill[fill=green, draw=black,shift={(xaxis:#1)},shift={(yaxis:#2)},
  shift={(zaxis:#3)}] (0,0) -- (0,-1) -- (210:1) --(150:1)--(0,0);
}
% The right side of a cube
newcommandrightside[3]{
  fill[fill=blue, draw=black,shift={(xaxis:#1)},shift={(yaxis:#2)},
  shift={(zaxis:#3)}] (0,0) -- (30:1) -- (-30:1) --(0,-1)--(0,0);
}
% The cube
newcommandcube[3]{
  topside{#1}{#2}{#3} leftside{#1}{#2}{#3} rightside{#1}{#2}{#3}
}
% Definition of planepartition
% To draw the following plane partition, just write planepartition{ {a, b, c}, {d,e} }.
%  a b c
%  d e
newcommandplanepartition[1]{
 setcounter{x}{-1}
  foreach a in {#1} {
    addtocounter{x}{1}
    setcounter{y}{-1}
    foreach b in a {
      addtocounter{y}{1}
      setcounter{z}{-1}
      foreach c in {1,...,b} {
        addtocounter{z}{1}
        cube{value{x}}{value{y}}{value{z}}
      }
    }
  }
}
begin{document}
begin{tikzpicture}
planepartition{{2,1,2,1,2,1,2},{1,1,1,1,1,1,1},{1,1,1,1,1,1,1},{1,1,1,1,1,1,1},{2,1,2,1,2,1,2}}%1st column from back to front{row1,... from left to right}%0 is the same as 2% it does not allow void for 0
end{tikzpicture}
end{document}