Making a table in LaTeX using TikZ of a triad census for directed graphs

tikz_triad_census.tex

\begin{figure*}[!tb]
\centering
\footnotesize
    \begin{tabular}{cccc}
    
   % First row of triad census
   \begin{tikzpicture}
    	[user/.style={circle,draw=black,fill=black!60,thick,text=white,inner sep=0pt,minimum size=.5cm},
    	->,-stealth,line width = 2, black,
    	font=\boldmath]
    	\node [user] (a) at (0,1.2) {};
    	\node [user] (b) at (.8,0) {};
    	\node [user] (c) at (-.8,0) {};
    	\path;
    \end{tikzpicture} &
    
    \begin{tikzpicture}
    	[user/.style={circle,draw=black,fill=black!60,thick,text=white,inner sep=0pt,minimum size=.5cm},
    	->,-stealth,line width = 2, black,
    	font=\boldmath]
    	\node [user] (a) at (0,1.2) {};
    	\node [user] (b) at (.8,0) {};
    	\node [user] (c) at (-.8,0) {};
    	\path
    	(c) edge (a);
    \end{tikzpicture} &
    
    \begin{tikzpicture}
    	[user/.style={circle,draw=black,fill=black!60,thick,text=white,inner sep=0pt,minimum size=.5cm},
    	->,-stealth,line width = 2, black,
    	font=\boldmath]
    	\node [user] (a) at (0,1.2) {};
    	\node [user] (b) at (.8,0) {};
    	\node [user] (c) at (-.8,0) {};
    	\path
    	(c) edge (a)
    	(a) edge (c);
    \end{tikzpicture} &
    
    \begin{tikzpicture}
    	[user/.style={circle,draw=black,fill=black!60,thick,text=white,inner sep=0pt,minimum size=.5cm},
    	->,-stealth,line width = 2, black,
    	font=\boldmath]
    	\node [user] (a) at (0,1.2) {};
    	\node [user] (b) at (.8,0) {};
    	\node [user] (c) at (-.8,0) {};
    	\path
    	(a) edge (b)
    	(a) edge (c);
    \end{tikzpicture} \\
    003 & 012 & 102 & 021D \\ \\
    
    % Second row
    \begin{tikzpicture}
    	[user/.style={circle,draw=black,fill=black!60,thick,text=white,inner sep=0pt,minimum size=.5cm},
    	->,-stealth,line width = 2, black,
    	font=\boldmath]
    	\node [user] (a) at (0,1.2) {};
    	\node [user] (b) at (.8,0) {};
    	\node [user] (c) at (-.8,0) {};
    	\path
    	(c) edge (a)
    	(b) edge (a);
    \end{tikzpicture} &
    
    \begin{tikzpicture}
    	[user/.style={circle,draw=black,fill=black!60,thick,text=white,inner sep=0pt,minimum size=.5cm},
    	->,-stealth,line width = 2, black,
    	font=\boldmath]
    	\node [user] (a) at (0,1.2) {};
    	\node [user] (b) at (.8,0) {};
    	\node [user] (c) at (-.8,0) {};
    	\path
    	(c) edge (a)
    	(a) edge (b);
    \end{tikzpicture} &
    
    \begin{tikzpicture}
    	[user/.style={circle,draw=black,fill=black!60,thick,text=white,inner sep=0pt,minimum size=.5cm},
    	->,-stealth,line width = 2, black,
    	font=\boldmath]
    	\node [user] (a) at (0,1.2) {};
    	\node [user] (b) at (.8,0) {};
    	\node [user] (c) at (-.8,0) {};
    	\path
    	(a) edge (b)
    	(b) edge (c)
    	(c) edge (b);
    \end{tikzpicture} &
    
    \begin{tikzpicture}
    	[user/.style={circle,draw=black,fill=black!60,thick,text=white,inner sep=0pt,minimum size=.5cm},
    	->,-stealth,line width = 2, black,
    	font=\boldmath]
    	\node [user] (a) at (0,1.2) {};
    	\node [user] (b) at (.8,0) {};
    	\node [user] (c) at (-.8,0) {};
    	\path
    	(b) edge (a)
    	(b) edge (c)
    	(c) edge (b);
    \end{tikzpicture} \\
    021U & 021C & 111D & 111U \\ \\
    
    % Third row
    \begin{tikzpicture}
    	[user/.style={circle,draw=black,fill=black!60,thick,text=white,inner sep=0pt,minimum size=.5cm},
    	->,-stealth,line width = 2, black,
    	font=\boldmath]
    	\node [user] (a) at (0,1.2) {};
    	\node [user] (b) at (.8,0) {};
    	\node [user] (c) at (-.8,0) {};
    	\path
    	(c) edge (a)
    	(b) edge (a)
    	(c) edge (b);
    \end{tikzpicture} &
    
    \begin{tikzpicture}
    	[user/.style={circle,draw=black,fill=black!60,thick,text=white,inner sep=0pt,minimum size=.5cm},
    	->,-stealth,line width = 2, black,
    	font=\boldmath]
    	\node [user] (a) at (0,1.2) {};
    	\node [user] (b) at (.8,0) {};
    	\node [user] (c) at (-.8,0) {};
    	\path
    	(a) edge (c)
    	(c) edge (b)
    	(b) edge (a);
    \end{tikzpicture} &
    
    \begin{tikzpicture}
    	[user/.style={circle,draw=black,fill=black!60,thick,text=white,inner sep=0pt,minimum size=.5cm},
    	->,-stealth,line width = 2, black,
    	font=\boldmath]
    	\node [user] (a) at (0,1.2) {};
    	\node [user] (b) at (.8,0) {};
    	\node [user] (c) at (-.8,0) {};
    	\path
    	(a) edge (c)
    	(c) edge (a)
    	(b) edge (c)
    	(c) edge (b)
    \end{tikzpicture} &
    
    \begin{tikzpicture}
    	[user/.style={circle,draw=black,fill=black!60,thick,text=white,inner sep=0pt,minimum size=.5cm},
    	->,-stealth,line width = 2, black,
    	font=\boldmath]
    	\node [user] (a) at (0,1.2) {};
    	\node [user] (b) at (.8,0) {};
    	\node [user] (c) at (-.8,0) {};
    	\path
    	(a) edge (b)
    	(a) edge (c)
    	(b) edge (c)
    	(c) edge (b);
    \end{tikzpicture} \\
    030T & 030C & 201 & 120D \\ \\
    
    % Fourth row
    \begin{tikzpicture}
    	[user/.style={circle,draw=black,fill=black!60,thick,text=white,inner sep=0pt,minimum size=.5cm},
    	->,-stealth,line width = 2, black,
    	font=\boldmath]
    	\node [user] (a) at (0,1.2) {};
    	\node [user] (b) at (.8,0) {};
    	\node [user] (c) at (-.8,0) {};
    	\path
    	(b) edge (a)
    	(c) edge (a)
    	(b) edge (c)
    	(c) edge (b);
    \end{tikzpicture} &
    \begin{tikzpicture}
    	[user/.style={circle,draw=black,fill=black!60,thick,text=white,inner sep=0pt,minimum size=.5cm},
    	->,-stealth,line width = 2, black,
    	font=\boldmath]
    	\node [user] (a) at (0,1.2) {};
    	\node [user] (b) at (.8,0) {};
    	\node [user] (c) at (-.8,0) {};
    	\path
    	(a) edge (b)
    	(c) edge (a)
    	(b) edge (c)
    	(c) edge (b);
    \end{tikzpicture} &
    \begin{tikzpicture}
    	[user/.style={circle,draw=black,fill=black!60,thick,text=white,inner sep=0pt,minimum size=.5cm},
    	->,-stealth,line width = 2, black,
    	font=\boldmath]
    	\node [user] (a) at (0,1.2) {};
    	\node [user] (b) at (.8,0) {};
    	\node [user] (c) at (-.8,0) {};
    	\path
    	(a) edge (b)
    	(b) edge (a)
    	(c) edge (a)
    	(b) edge (c)
    	(c) edge (b);
    \end{tikzpicture} &
    \begin{tikzpicture}
    	[user/.style={circle,draw=black,fill=black!60,thick,text=white,inner sep=0pt,minimum size=.5cm},
    	->,-stealth,line width = 2, black,
    	font=\boldmath]
    	\node [user] (a) at (0,1.2) {};
    	\node [user] (b) at (.8,0) {};
    	\node [user] (c) at (-.8,0) {};
    	\path
    	(a) edge (b)
    	(b) edge (a)
    	(a) edge (c)
    	(c) edge (a)
    	(b) edge (c)
    	(c) edge (b);
    \end{tikzpicture} \\
    120U & 120C & 210 & 300 
    
    \end{tabular}
\caption{Configurations of a triad census.}
\label{fig:triad_census}
\end{figure*} 

Thanks for the script. To work out properly there should be an additional semicolon in the end of line 143.