\documentclass{standalone}
\usepackage{tikz}
\usepackage[dvipsnames]{xcolor}
\begin{document}
\begin{tikzpicture}[scale=1]

  \draw[ultra thick] (0,0) rectangle (32,-1.2);

  \foreach \j in {1,...,3} {
    \draw[ultra thick] (\j * 8,0) -- (\j * 8,-1.2);
  }

  \foreach \j in {0,...,3} {
    \foreach \i in {1,...,7} {
      \draw[very thick] (\i + \j * 8,0) -- (\i + \j * 8,-0.2);
    }
  }

  \foreach \j in {0,...,3} {
    \node[font=\huge\bfseries]  at (8 * \j + 4.0,-0.7)  {C\pgfmathparse{int(3 - \j)}\pgfmathresult};
    \node[font=\large\bfseries]  at (8 * \j + 7.5,0.25)  {\pgfmathparse{int((3 - \j) * 8)}\pgfmathresult};
  }
  \node[font=\large\bfseries]  at (8 * 0 + 0.0,0.25)  {\pgfmathparse{int((4 - 0) * 8)}\pgfmathresult};


  %\node[font=\huge\bfseries,text=MidnightBlue ]  at ( 0 + 4.5,-1.5)  {blue };
  %\node[font=\huge\bfseries,text=OliveGreen   ]  at ( 8 + 4.5,-1.5)  {green};
  %\node[font=\huge\bfseries,text=BrickRed     ]  at (16 + 4.5,-1.5)  {red  };
  %\node[font=\huge\bfseries,text=black        ]  at (24 + 4.5,-1.5)  {alpha};

\end{tikzpicture}

\end{document}
