\usetikzlibrary{calc,trees,positioning,arrows,chains,shapes.geometric,%
decorations.pathreplacing,decorations.pathmorphing,shapes,%
matrix,shapes.symbols,plotmarks,decorations.markings,shadows,backgrounds}


\pgfdeclarelayer{background}
\pgfdeclarelayer{foreground}
\pgfdeclarelayer{L0}
\pgfdeclarelayer{L1}
\pgfdeclarelayer{L2}
\pgfdeclarelayer{L3}
\pgfsetlayers{background,L0,L1,L2,L3,main,foreground}

\newcommand{\scale}{0.7}

\begin{tikzpicture}[scale=\scale,every node/.style={scale=\scale},on grid ]
	
	\definecolor{LCUFill}{rgb}{0,0.5,1}
	\definecolor{DrawColor}{rgb}{0,0,0.5}
	\definecolor{LCUFill}{rgb}{1,1,1}
	\definecolor{DrawColor}{rgb}{0,0,0}

	\tikzstyle{TextStyle}=[scale=1.5, text centered]

	\tikzstyle{LCU}=[draw=DrawColor, fill=LCUFill,thick]
	\tikzstyle{CU}=[draw=DrawColor,thick]
	\tikzstyle{PU}=[draw=DrawColor, densely dashed]

% 	\newcommand{\gridsize}{70}
% 	\draw[help lines] (-\gridsize,-\gridsize) grid ++(\gridsize*2,\gridsize*2);


	\begin{scope}[xshift=0]
		\draw[LCU] (0,0) rectangle ++(4,4);  	% 64x64
		\draw[CU]  (0,0) rectangle ++(1,4);  	% 64x64
		\draw[CU]  (1,0) rectangle ++(3,4);  	% 64x64
		\node[TextStyle] at (2.5,2) {$\frac{3N}{4}\times N$};
	\end{scope}

	\begin{scope}[xshift=5cm]
		\draw[LCU] (0,0) rectangle ++(4,4);  	% 64x64
		\draw[CU]  (0,0) rectangle ++(3,4);  	% 64x64
		\draw[CU]  (3,0) rectangle ++(1,4);  	% 64x64
		\node[TextStyle] at (1.5,2) {$\frac{3N}{4}\times N$};
	\end{scope}

	\begin{scope}[xshift=10cm]
		\draw[LCU] (0,0) rectangle ++(4,4);  	% 64x64
		\draw[CU]  (0,0) rectangle ++(4,3);  	% 64x64
		\draw[CU]  (0,3) rectangle ++(4,1);  	% 64x64
		\node[TextStyle] at (2,1.5) {$N\times\frac{3N}{4}$};
	\end{scope}

	\begin{scope}[xshift=15cm]
		\draw[LCU] (0,0) rectangle ++(4,4);  	% 64x64
		\draw[CU]  (0,0) rectangle ++(4,1);  	% 64x64
		\draw[CU]  (0,1) rectangle ++(4,3);  	% 64x64
		\node[TextStyle] at (2,2.5) {$N\times\frac{3N}{4}$};
	\end{scope}

% 	\draw[CU] (0,0) rectangle ++(16,16);  	% 64x64
% 
% 	\node[TextStyle] at (4,12) {$32\times32$};
% 	\draw[CU]  (0,0) rectangle ++(8,8);			% 32x32
% 	\draw[CU]  (8,8) rectangle ++(8,8);			% 32x32
% 
% 	\node[TextStyle] at (10,14) {$16\times16$};
% 	\draw[CU]  (0,0) rectangle ++(4,4);			% 16x16
% 	\draw[CU]  (4,4) rectangle ++(4,4);			% 16x16
% 
% 	\draw[CU]  (8,8) rectangle ++(4,4);			% 16x16
% 	\draw[CU]  (12,12) rectangle ++(4,4);	% 16x16
% 	
% 	\node[TextStyle] at (13,11) {$8\times8$};
% 	\draw[CU]  (12,8) rectangle ++(2,2);			% 8x8
% 	\draw[CU]  (14,10) rectangle ++(2,2);			% 8x8
	



\end{tikzpicture}