\begin{gantt}{5}{8}
\begin{ganttitle}
\numtitle{5}{5}{40}{1}
\end{ganttitle}
\ganttbar{Base}{0}{2}
\ganttbar{Fenêtrage}{2}{2}
\ganttbar{Hashlife}{4}{4}
\ganttbar{Rapport}{0}{8}
\end{gantt}