
  \def\cone{(90:2cm) circle (2.5cm)}
  \def\ctwo{(180:2cm) circle (2.5cm)}
  \def\cthree{(270:2cm) circle (2.5cm)}
  \def\cfour{(360:2cm) circle (2.5cm)}
  \def\universe{(-5, -5) rectangle (5,5)}
    \begin{tikzpicture}[scale=0.8]

      \fill[cyan] \universe;
      \begin{scope}
        \clip \ctwo;
        \fill[white] \universe;
      \end{scope}
      \begin{scope}
        \clip \cthree;
        \fill[white] \universe;
      \end{scope}
      \begin{scope}
        \clip \cfour;
        \fill[white] \universe;
      \end{scope}

      \draw \cone node[text=black,above] {$c_1$};
      \draw \ctwo node [text=black,left] {$c_2$};
      \draw \cthree node [text=black,below] {$c_3$};
      \draw \cfour node [text=black,right] {$c_4$};
      \draw \universe;
      \draw (0, 5) node [text=black,above] {$N$};
    \end{tikzpicture}