\newcommand{\DrawFrame}
{
\draw[fill=TikZColorFill,fill opacity=1, thick] (0,0) rectangle (10,8); % Opacity
}
\newcommand{\DrawFrameBorder}
{
\draw[thick] (0,0) rectangle ++(10,8);
}

\newcommand{\DrawRandomBlocks}
{
\foreach \x in {1,2,...,14}
  \pgfmathparse{round((rand+1)/2*9) }
  \let\roundX\pgfmathresult
  \pgfmathparse{round((rand+1)/2*7) }
  \let\roundY\pgfmathresult
  \draw[refreshBlock] (\roundX,\roundY) rectangle ++(1cm,1cm);
}

\begin{tikzpicture}[use Hobby shortcut,closed=true]

\def\TikzFrameScale{.3}

\tikzstyle{FrameLabels}       =[text centered, anchor=center]
\tikzstyle{labels}            =[text centered, font=\footnotesize]
\tikzstyle{arrow}             =[draw,-latex, thick]
\tikzstyle{refreshBlock}        =[draw, fill=TikZColorBlock1]
\tikzstyle{refreshBlock}      =[fill=TikZColorFillDark,draw=TikZColorFillDark]
\def\xfshift{8cm}
\def\yfshift{.2cm}

\def\errorPosX{3}
\def\errorPosY{5}

\begin{scope}

  \begin{scope}
    \begin{scope}[scale=\TikzFrameScale, yshift=3*\yfshift, xshift=3*\xfshift, yslant=\TikZyslant,xscale=\TikZxscale]
      \DrawFrame
      \coordinate (Center) at (5,3.5);
      \node[FrameLabels] (FrameLabel) at (12cm/2,-1.8cm) { $f_{t+3}$ };

      \DrawRandomBlocks

      \coordinate (endPoint) at (9,0);
      \DrawFrameBorder
    \end{scope}
    \begin{scope}[scale=\TikzFrameScale, yshift=2*\yfshift, xshift=2*\xfshift, yslant=\TikZyslant,xscale=\TikZxscale]
      \DrawFrame
      \coordinate (Center) at (5,3.5);

      \DrawRandomBlocks
      \DrawFrameBorder
    \end{scope}
    \node[FrameLabels] at (Center |- FrameLabel) { $f_{t+2}$ };
    \begin{scope}[scale=\TikzFrameScale, yshift=1*\yfshift, xshift=1*\xfshift, yslant=\TikZyslant,xscale=\TikZxscale]
      \DrawFrame
      \coordinate (Center) at (5,3.5);
      \DrawRandomBlocks
      \DrawFrameBorder
    \end{scope}
    \node[FrameLabels] at (Center |- FrameLabel) { $f_{t+1}$ };
    \begin{scope}[scale=\TikzFrameScale, yshift=0*\yfshift, xshift=0*\xfshift, yslant=\TikZyslant,xscale=\TikZxscale]
      \DrawFrame
      \coordinate (Center) at (5,3.5);

      \DrawRandomBlocks

      \coordinate (startPoint) at (0,0);
      \DrawFrameBorder
    \end{scope}
    \node[FrameLabels] at (Center |- FrameLabel) { $f_{t}$ };
    \path[draw, -latex] ($(FrameLabel)+(-8.8,-.4)$) -- ($(FrameLabel)+(1.2,-.4)$) node[below] {t} node[below, midway, yshift=-4] {(a) Random intra-refresh};
  \end{scope}

  \begin{scope}[yshift=-5cm]
    \begin{scope}[scale=\TikzFrameScale, yshift=3*\yfshift, xshift=3*\xfshift, yslant=\TikZyslant,xscale=\TikZxscale]
      \DrawFrame
      \coordinate (Center) at (5,3.5);
      \node[FrameLabels] (FrameLabel) at (12cm/2,-1.8cm) { $f_{t+3}$ };


      \foreach \x in {2,...,8}
        \foreach \y in {4,...,6}
          \draw[refreshBlock] (\x,\y) rectangle ++(1cm,1cm);
      \draw[refreshBlock] (2,3) rectangle ++(1cm,1cm);
      \draw[refreshBlock] (3,3) rectangle ++(1cm,1cm);
      \draw[refreshBlock] (6,3) rectangle ++(1cm,1cm);
      \draw[refreshBlock] (7,3) rectangle ++(1cm,1cm);

      \begin{scope}[scale=.8, yshift=5.3cm, xshift=5.8cm]
        \draw[thick] (-3.5,0.5) .. (-3,2.5) .. (-1,3.5).. (1.5,3).. (4,3.5).. (5,2.5).. (5,0.5) ..(2.5,-2).. (0,-0.5).. (-3,-2).. (-3.5,0.5);
      \end{scope}

      \coordinate (endPoint) at (9,0);
      \DrawFrameBorder
    \end{scope}

    \begin{scope}[scale=\TikzFrameScale, yshift=2*\yfshift, xshift=2*\xfshift, yslant=\TikZyslant,xscale=\TikZxscale]
      \DrawFrame
      \coordinate (Center) at (5,3.5);


      \foreach \x in {2,...,6}
        \foreach \y in {4,...,6}
          \draw[refreshBlock] (\x,\y) rectangle ++(1cm,1cm);
      \draw[refreshBlock] (5,3) rectangle ++(1cm,1cm);
      \draw[refreshBlock] (6,3) rectangle ++(1cm,1cm);
      \draw[refreshBlock] (7,4) rectangle ++(1cm,1cm);
      \draw[refreshBlock] (7,5) rectangle ++(1cm,1cm);

      \begin{scope}[scale=.8, yshift=5.3cm, xshift=4.8cm]
        \draw[thick] (-3,0.5) .. (-2.5,2.5) .. (-.8,3.5).. (1.5,3).. (4.2,2.8).. (5,2.5).. (5,0.5) ..(2.5,-2).. (0,-0.5).. (-1,-.5).. (-3,0.5);
      \end{scope}
      \DrawFrameBorder
    \end{scope}
    \node[FrameLabels] at (Center |- FrameLabel) { $f_{t+2}$ };

    \begin{scope}[scale=\TikzFrameScale, yshift=1*\yfshift, xshift=1*\xfshift, yslant=\TikZyslant,xscale=\TikZxscale]
      \DrawFrame
      \coordinate (Center) at (5,3.5);


      \foreach \x in {2,...,6}
        \foreach \y in {3,...,5}
          \draw[refreshBlock] (\x,\y) rectangle ++(1cm,1cm);
      \draw[refreshBlock] (5,2) rectangle ++(1cm,1cm);
      \draw[refreshBlock] (6,2) rectangle ++(1cm,1cm);
      \draw[refreshBlock] (7,3) rectangle ++(1cm,1cm);
      \draw[refreshBlock] (7,4) rectangle ++(1cm,1cm);

      \begin{scope}[scale=.8, yshift=4.3cm, xshift=4.8cm]
        \draw[thick] (-3,0.5) .. (-2.5,2.5) .. (-.8,3.5).. (1.5,3).. (4.2,2.8).. (5,2.5).. (5,0.5) ..(2.5,-2).. (0,-0.5).. (-1,-.5).. (-3,0.5);
      \end{scope}
      \DrawFrameBorder
    \end{scope}
    \node[FrameLabels] at (Center |- FrameLabel) { $f_{t+1}$ };

    \node[labels, anchor=center] at (-.8, 2.5) (RoiLabel) {\small ROI};
    \begin{scope}[scale=\TikzFrameScale, yshift=0*\yfshift, xshift=0*\xfshift, yslant=\TikZyslant,xscale=\TikZxscale]
      \DrawFrame
      \coordinate (Center) at (5,3.5);

      \foreach \x in {1,...,7}
        \foreach \y in {2,...,4}
          \draw[refreshBlock] (\x,\y) rectangle ++(1cm,1cm);
      \draw[refreshBlock] (1,1) rectangle ++(1cm,1cm);
      \draw[refreshBlock] (2,1) rectangle ++(1cm,1cm);
      \draw[refreshBlock] (5,1) rectangle ++(1cm,1cm);
      \draw[refreshBlock] (6,1) rectangle ++(1cm,1cm);

      \begin{scope}[scale=.8, yshift=3.3cm, xshift=4.8cm]
        \draw[thick] (-3.5,0.5) .. (-3,2.5) .. (-1,3.5).. (1.5,3).. (4,3.5).. (5,2.5).. (5,0.5) ..(2.5,-2).. (0,-0.5).. (-3,-2).. (-3.5,0.5);
      \end{scope}

      \path[draw,-latex] (RoiLabel) -- (2.1,5.3);


      \coordinate (startPoint) at (0,0);
      \DrawFrameBorder
    \end{scope}
    \node[FrameLabels] at (Center |- FrameLabel) { $f_{t}$ };
    \path[draw, -latex] ($(FrameLabel)+(-8.8,-.4)$) -- ($(FrameLabel)+(1.2,-.4)$) node[below] {t} node[below, midway, yshift=-4] {(b) ROI based intra-refresh};
  \end{scope}

  \node[refreshBlock, anchor=center, minimum size=.5cm] (RefreshExample) at (0, -7.5) {};
  \node[labels, anchor=center, right=.1 of RefreshExample] {\small Intra-coded blocks};



   \path (-1.4,-3) rectangle ++(12.3,2);
\end{scope}




\end{tikzpicture}