\documentclass[landscape]{article}
\usepackage{tikz}
\begin{document}
\begin{tikzpicture}
\draw (0,0) rectangle +(10,10);
\draw[thick,red] (0,0) arc(180:90:10);
\node[below] at (5,0) {$c_1=1$};
\node[red] at (2.5,7.5) {$\ell_1$};
%
\draw (10,10) rectangle +(5,-5);
\draw[thick,red] (10,10) arc(90:0:5);
\node[right] at (15,7.5) {$c_2$};
\node[red] at (14,8.5) {$\ell_2$};
%
\draw (15,5) rectangle +(-2.5,-2.5);
\draw[thick,red] (15,5) arc(0:-90:2.5);
\node[right] at (15,3.75) {$c_3$};
\node[red] at (14.5,3) {$\ell_3$};
%
\draw (12.5,2.5) rectangle +(-1.25,1.25);
\draw[thick,red] (12.5,2.5) arc(-90:-180:1.25);
\node[below] at (11.8,2.5) {$c_4$};
\node[red] at (11.8,3) {$\ell_4$};
%
\draw (11.25,3.75) rectangle +(0.625,0.625);
\draw[thick,red] (11.25,3.75) arc(180:90:0.625);
\end{tikzpicture}
\end{document}