\documentclass{standalone}
\usepackage{tikz}
\begin{document}

\begin{tikzpicture}[scale = 1.2]
\coordinate (-1) at (0,0) {};
\coordinate (0) at (0,1) {};
\coordinate (1) at (1, 1) {};
\coordinate (1') at (1,2) {};
\coordinate (2) at (1,3) {};
\coordinate (3) at ( 2,3 ) {};
\coordinate (4) at ( 1.05,0 ) {};
\coordinate (5) at ( 1.05,1 ) {};
\coordinate (6) at ( 1.05,2 ) {};
\coordinate (7) at ( 1.05,3 ) {};
\coordinate (8) at ( 1.05,4 ) {};
\coordinate (9) at (2,4){};

\node at (-0.3,0) {$ P $};
\node at (-0.3,1) {$ Q $};

\node at (0.8,0.5) {$ A $};
\node at (0.8,2) {$ B $};
\node at (0.8,3.5) {$ C $};

\node at (2.3,3) {$ Q $};
\node at (2.3,4) {$ P $};

\draw [red,thick](0) -- (1) node   {};
\draw [red,thick](2) -- (3) node   {};
\draw [red,thick](1) -- (1') node   {};
\draw [red,thick](1') -- (2) node   {};
\draw [blue,thick](-1) -- (4) node {};
\draw [blue,thick](4) -- (5) node  {};
\draw [blue,thick](5) -- (6) node {} ;
\draw [blue,thick](6) -- (7) node  {};
\draw [blue,thick](7) -- (8) node {} ;
\draw [blue,thick](8) -- (9) node {};
\end{tikzpicture}


\end{document}


