\node (point) at (0, 0) {$\color{red}{\bullet}$};

\node (line0) at (2, 1)  {$\color{blue}{\bullet}_0$};
\node (line1) at (2, -1) {$\color{red}{\bullet}_1$};

\draw (line0) -- (line1) node[midway] (linemid) {};
;
\draw[->] (point) to[out=-70,in=180] node[midway] (a) {$\delta^1$} (line1);

\node (sq00) at (4, -1) {$\color{red}\bullet_{01}$};
\node (sq01) at (4, 1)  {$\color{blue}{\bullet}_{00}$};
\node (sq10) at (6, -1) {$\bullet_{11}$};
\node (sq11) at (6, 1)  {$\bullet_{10}$};

\draw (sq00) -- node[midway] (linemid_img) {} (sq01) -- (sq11) -- (sq10) -- (sq00);

\draw[->] (linemid) -- node[midway] (b) {$\delta^0_0$} (linemid_img);