Integrated blocks for thesis structure

You could use the jigsaw package to create such shapes:

\documentclass{standalone}

\usepackage[svgnames]{xcolor}
\usepackage{jigsaw}


\begin{document}

\begin{tikzpicture}

\tiny
\sffamily

\begin{scope}
    \color{blue!40!white}
    \piece[blue!40!white]{-1}{-1}{0}{0}
\end{scope}
\begin{scope}[xshift=1cm]
    \color{green!30!white}
    \piece[green!30!white]{1}{1}{0}{1}
\end{scope}   
\begin{scope}[xshift=2cm]
    \color{green!30!white}
    \piece[green!30!white]{0}{1}{0}{-1}
\end{scope}    
\begin{scope}[xshift=3cm]
    \color{orange}
    \piece[orange]{-1}{0}{0}{-1}
\end{scope}       

\begin{scope}[yshift=-1cm]
    \color{green!50!black}
    \piece[green!50!black]{0}{-1}{1}{0}
\end{scope}
\begin{scope}[xshift=1cm,yshift=-1cm]
    \color{brown}
    \piece[brown]{0}{0}{-1}{1}
\end{scope}   
\begin{scope}[xshift=2cm,yshift=-1cm]
    \color{blue}
    \piece[blue]{0}{1}{0}{0}
\end{scope}    
\begin{scope}[xshift=3cm,yshift=-1cm]
    \color{blue!25!white}
    \piece[blue!25!white]{0}{0}{1}{-1}
\end{scope}      

\node at (0.5,0.5) {Abstract};
\node at (2,0.5) {Literature Review};
\node at (3.5,0.5) {Discussion};

\node at (0.5,-0.5) {\color{white}Introduction};
\node at (1.6,-0.5) {Methods};
\node at (2.4,-0.5) {\color{white}Results};
\node at (3.5,-0.5) {Conclusions};

\end{tikzpicture}