\begin{itemize}
\item First item
\item Second item
....
\end{itemize}
The itemize environment produces a list with "tick-marks" (typically
"bullets" for first level). Itemizations can be
nested within one another, up to four levels deep.
Each item of an itemized list begins with an \item command. There must be at least one \item command within the environment.
The default optional label argument of the \item command is given by the \labelitemi, \labelitemii, \labelitemiii, \labelitemiv commands, respectively, depending on the nesting level. These may be redefined with the \renewcommand command. For example, to make the first level marks nice five-point stars,
\renewcommand{\labelitemi}{$\star$}