\begin{tikzpicture}[baseline]
\node (x) at (0,0){};
    \draw[->] (x.45)-- (.5,.5);
    \draw[->] (x.135) -- (-.5,.5);
    \draw (x.225) -- (-.5,-.5);
    \draw (x.135) -- (.5,-.5);


\node at (-.75,-.75){$A$};
\node at (.75,-.75){$X$};
\end{tikzpicture}