\begin{subfigure}{0.4\textwidth}
			\begin{tikzpicture}[scale=1.44]
				\node[color=white] at (-1,0) {$.$};
				\node[color=white] at (3,0) {$.$}; %Just a trick s.t. the figures are aligned
				%\path[fill=myred!10] (0,0) rectangle (1,-1) node[pos=.5, color=black] {};
				%\path[fill=myred!10] (1,-2) rectangle (2,-3) node[pos=.5, color=black] {};
				\path[fill=gray!20] (0,0) rectangle (1,-1) node[pos=.5, color=black] {\scriptsize $w(1,0)^{-1}$};
				\path[fill=gray!20] (1,0) rectangle (2,-1) node[pos=.5, color=black] {\scriptsize $w(2,0)^{-1}$};
				\path[fill=gray!20] (1,-1) rectangle (2,-2) node[pos=.5, color=black] {\scriptsize $w(2,-1)^{-1}$};
				\path[fill=gray!20] (1,-2) rectangle (2,-3) node[pos=.5, color=black] {\scriptsize $w(2,-2)^{-1}$};
				\draw[->,>=latex] (0,-4.3) -- (0,0.3);
				\draw[->,>=latex] (-0.3,0) -- (2.3,0);
				\foreach \x in {0,...,2}
					\draw[dotted] (\x,0)--(\x,-4);
				\foreach \y in {-4,...,0}
					\draw[dotted] (0,\y)--(2,\y);
				\draw[line width=2pt, myblue] (0,0)--(0,-1);
				\draw[line width=2pt,rounded corners=9pt, myblue] (0,-1) -- (1,-1)--(1,-3);
				\draw[line width=2pt,->,>=latex, shorten >=2pt,rounded corners=9pt,myblue] (1,-3) -- (2,-3) --(2,-4);
				\foreach \x in {0,...,2}
					\foreach \y in {-4,...,0}
						\draw[fill=black](\x,\y)circle(2pt);
				\node[below,myblue] at (0.5,-1) {\scriptsize $W\!(1,-1)$};	
				\node[below,myblue] at (1.5,-3) {\scriptsize $W\!(2,-3)$};	
				\node[left,myblue] at (0,-0.5) {\scriptsize $1$};
				\node[left,myblue] at (1,-2.5) {\scriptsize $1$};	
				\node[left,myblue] at (1,-1.6) {\scriptsize $(-1)$};
				\node[left,myblue] at (2,-3.6) {\scriptsize $(-1)$};
				\node[above left] at (0,0) {$(0,0)$};
			\end{tikzpicture}
		\end{subfigure}
		\begin{subfigure}{0.45\textwidth}
			\begin{tikzpicture}[scale=1.44]
				\draw[->,>=latex] (0,-0.3) -- (0,2.3);
				\draw[->,>=latex] (-4.3,0) -- (0.3,0);
				%\path[fill=myred!10] (-2,0) rectangle (-1,1) node[pos=.5, color=black] {};
				\path[fill=gray!20] (-2,0) rectangle (-1,1) node[pos=.5, color=black] {\scriptsize $w(-1,1)^{-1}$};
				\path[fill=gray!20] (-3,0) rectangle (-2,1) node[pos=.5, color=black] {\scriptsize $w(-2,1)^{-1}$};
				\path[fill=gray!20] (-4,0) rectangle (-3,1) node[pos=.5, color=black] {\scriptsize $w(-3,1)^{-1}$};
				%\path[fill=myred!10] (-4,1) rectangle (-3,2) node[pos=.5, color=black] {};
				\path[fill=gray!20] (-4,1) rectangle (-3,2) node[pos=.5, color=black] {\scriptsize $w(-3,2)^{-1}$};
				\foreach \x in {-4,...,0}
					\draw[dotted] (\x,0)--(\x,2);
				\foreach \y in {0,...,2}
					\draw[dotted] (0,\y)--(-4,\y);
				\draw[line width=2pt,myblue] (0,0)--(-1,0);
				\draw[line width=2pt, rounded corners=9pt, myblue] (-1,0) -- (-1,1) -- (-3,1);
				\draw[line width=2pt,->,>=latex, shorten >=2pt,rounded corners=9pt,myblue] (-3,1) -- (-3,2) -- (-4,2);
				\foreach \x in {-4,...,0}
					\foreach \y in {0,...,2}
						\draw[fill=black](\x,\y)circle(2pt);				
				\node[above,myblue] at (-0.5,0) {\scriptsize $W\!(0,0)^{-1}$};	
				\node[above,myblue] at (-1.5,1) {\scriptsize $W\!(-1,1)^{-1}$};
				\node[above,myblue] at (-2.5,1) {\scriptsize $W\!(-2,1)^{-1}$};
				\node[above,myblue] at (-3.5,2) {\scriptsize $W\!(-3,2)^{-1}$};
				\node[right,myblue] at (-1,0.6) {\scriptsize $(-1)$};
				\node[right,myblue] at (-3,1.6) {\scriptsize $(-1)$};
				\node[below right] at (0,0) {$(0,0)$};	
			\end{tikzpicture}
		\end{subfigure}