documentclass{beamer}
setbeamertemplate{navigation symbols}{}
usepackage{tikz}
begin{document}
begin{frame}[t]
frametitle{cube}
begin{minipage}{textwidth}
newsavebox{hh}
savebox{hh}{
newcommand{Depth}{1}
newcommand{Height}{1}
newcommand{Width}{1}
begin{tikzpicture}[scale=.9, transform shape]
coordinate (O) at (0,0,0);
coordinate (A) at (0,Width,0);
coordinate (B) at (0,Width,Height);
coordinate (C) at (0,0,Height);
coordinate (D) at (Depth,0,0);
coordinate (E) at (Depth,Width,0);
coordinate (F) at (Depth,Width,Height);
coordinate (G) at (Depth,0,Height);
draw[blue,fill=yellow!80] (O) -- (C) -- (G) -- (D) -- cycle;
draw[blue,fill=blue!30] (O) -- (A) -- (E) -- (D) -- cycle;
draw[blue,fill=red!10] (O) -- (A) -- (B) -- (C) -- cycle;
draw[blue,fill=red!20,opacity=0.8] (D) -- (E) -- (F) -- (G) -- cycle;
draw[blue,fill=red!20,opacity=0.6] (C) -- (B) -- (F) -- (G) -- cycle;
draw[blue,fill=red!20,opacity=0.8] (A) -- (B) -- (F) -- (E) -- cycle;
end{tikzpicture}}
foreach x in {0,...,3} {usebox{hh}}
foreach x in {0,...,3} {usebox{hh}}
foreach x in {0,...,3} {usebox{hh}}
foreach x in {0,...,3} {usebox{hh}}
end{minipage}
end{frame}
end{document}