\documentclass{beamer}
\usepackage[utf8]{inputenc}
\usetheme{fri}
% The optional `\author` command defines the author and is displayed in the slide produced by the `\titlepage` command.
\author{Name of the author}
% The optional `\title` command defines the title and is displayed in the slide produced by the `\titlepage` command.
\title{FRI presentiation}
% The optional `\subtitle` command will add a smaller title below the main one, and will not be displayed in any of the slides' footer.
\subtitle{FRI presentation - subtitle}
% The optional `\date` command will display a custom free text date on the all of the slides' footer. If omitted today's date will be used.
%\date{29. august 2024}
\begin{document}
\frontcover
% The optional `\titlepage` command will create a slide with the presentation's title, subtitle and author.
\frame{\titlepage}
% The optional `\tableofcontents` command will automatically create a table of contents based pm the sections.
\frame{\tableofcontents}
\section{Introduction}
\begin{frame}{Introduction}
Some introduction text
\end{frame}
\section{Section 1}
\frame{\sectionpage}
\begin{frame}{Section 1}
Slide with header and text
\end{frame}
\begin{frame}
Next slide without header
\end{frame}
\section{Section 2}
\frame{\sectionpage}
\begin{frame}{Section 2}
\begin{itemize}
\item Slide
\item with header
\item and bullets
\end{itemize}
\end{frame}
\section{Conclusion}
\begin{frame}{Conclusion}
\begin{itemize}
\item Slide
\item with header
\item and bullets
\end{itemize}
\end{frame}
\backcover
\end{document}