\begin{tikzpicture} \node (a) at (0,0) {}; \node (b) at (1,0) {}; \node (c) at (1,1) {}; \node (d) at (0,1) {}; \coordinate (m) at ($(a)!0.5!(c)$); \coordinate (ab) at ($(a)!0.5!(b)$); \coordinate (bc) at ($(b)!0.5!(c)$); \coordinate (cd) at ($(c)!0.5!(d)$); \coordinate (ad) at ($(a)!0.5!(d)$); \draw[pattern=north west lines] (d.center) -- (ad.center) -- (m.center); \draw[pattern=dots] (m.center) -- (bc.center) -- (c.center); \draw (a.center) -- (b.center) -- (c.center) -- (d.center) -- cycle; \begin{scope}[decoration={ markings, mark=at position 0.6 with {\arrow{>}}} ] \draw[postaction={decorate}] (a.center) -- (b.center); \draw[postaction={decorate}] (d.center) -- (c.center); \end{scope} \begin{scope}[decoration={ markings, mark=at position 0.55 with {\arrow{>>}}} ] \draw[postaction={decorate}] (b.center) -- (c.center); \draw[postaction={decorate}] (a.center) -- (d.center); \end{scope} \draw (ab.center) -- (cd.center); \draw (a.center) -- (c.center); \draw (b.center) -- (d.center); \end{tikzpicture}