\documentclass{beamer}
\usepackage[T1]{fontenc}
\usepackage[utf8]{inputenc}
\usepackage[english]{babel}
\usepackage{lmodern}
% Use Unipd as theme, with options:
% - pageofpages: define the separation symbol of the footer page of pages (e.g.: of, di, /, default: of)
% - logo: position another logo near the Unipd logo in the title page (e.g. department logo), passing the second logo path as option 
% Use the environment lastframe to add the endframe text
\usetheme[pageofpages=of]{Unipd}
\title{Presentations using the Unipd theme}
\subtitle{Demonstrating how to use the Unipd theme}
\author[Pippo, Pluto]{G.~Pippo \and P.~Pluto}
\date{April 20, 2000}
% The next block of commands puts the table of contents at the beginning of each section and highlights the current section
\AtBeginSection[]
{
  \begin{frame}
    \frametitle{Table of Contents}
    \tableofcontents[currentsection]
  \end{frame}
}
\begin{document}
% Make the title page
\frame{\titlepage}
% Insert the general toc
\begin{frame}{Table of Contents}
    \tableofcontents    
\end{frame}
\section{First section}
    \begin{frame}{First section}
        In this slide, some important text will be
        \alert{highlighted} because it's important.
        Here an ordered list:
        \begin{enumerate}
            \item First item
            \item Second item
        \end{enumerate}
        Here an unordered list: 
        \begin{itemize}
            \item One item
            \item Another item
        \end{itemize}
    \end{frame}
    
\section{Second section}
    \begin{frame}{Second section}
        \begin{block}{Block}
            Sample text in a normal block
        \end{block}
   
        \begin{alertblock}{Alert block}
            Sample text in an alert block
        \end{alertblock}    
        
         \begin{example}
            Sample text for an example
        \end{example}
    \end{frame}
    
    \begin{emptyframe}
        Thank you!
    \end{emptyframe}
    \appendix
    \begin{frame}{Backup slide}
        Some additional content
    \end{frame}
    
\end{document}