%\begin{equation*}%\label{eq:orders}
\begin{figure}[h!]
\begin{center}
\begin{tikzpicture}[scale=.6]
%
\begin{scope}[xshift=0cm]
\draw
(0,1)--(1,1)
(0,2)--(3,2)
(1,1)--(1,3)
(2,1)--(2,3)
(3,2)--(3,3)
;
\draw[black!40,line width=2pt,->](.5,2.8)--(.5,.2);
\draw[black!40,line width=2pt,->](1.5,2.8)--(1.5,1.2);
\draw[black!40,line width=2pt,->](2.5,2.8)--(2.5,1.2);
\draw[black!40,line width=2pt,->](3.5,2.8)--(3.5,2.2)
;
\draw[line width=1pt](0,0)--(1,0)--(1,1)--(3,1)--(3,2)--(4,2)--(4,3)--(0,3)--cycle;
\draw[xshift=5mm,yshift=5mm]
(0,2)node{{$8$}}
(1,2)node{{$5$}}
(2,2)node{{$3$}}
(3,2)node{{$1$}}
(0,1)node{{$7$}}
(1,1)node{{$4$}}
(2,1)node{{$2$}}
(0,0)node{{$6$}};
\end{scope}
%
\begin{scope}[xshift=10cm]
\draw
(0,1)--(1,1)
(0,2)--(3,2)
(1,1)--(1,3)
(2,1)--(2,3)
(3,2)--(3,3)
;
\draw[black!40,line width=2pt,->](.2,.8)--(.8,.2);
\draw[black!40,line width=2pt,->](.2,1.8)--(.8,1.2);
\draw[black!40,line width=2pt,->](.2,2.8)--(1.8,1.2);
\draw[black!40,line width=2pt,->](1.2,2.8)--(2.8,1.2);
\draw[black!40,line width=2pt,->](2.2,2.8)--(2.8,2.2);
\draw[black!40,line width=2pt,->](3.2,2.8)--(3.8,2.2)
;
\draw[line width=1pt](0,0)--(1,0)--(1,1)--(3,1)--(3,2)--(4,2)--(4,3)--(0,3)--cycle;
\draw[xshift=5mm,yshift=5mm]
(0,2)node{{$6$}}
(1,2)node{{$4$}}
(2,2)node{{$2$}}
(3,2)node{{$1$}}
(0,1)node{{$7$}}
(1,1)node{{$5$}}
(2,1)node{{$3$}}
(0,0)node{{$8$}};
\end{scope}
%
\end{tikzpicture}
\end{center}
\caption{}
\label{fig:pic_orders}
\end{figure}
%\end{equation*}