\begin
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\documentclass[xcolor={dvipsnames}]{beamer}
\usepackage[utf8]{inputenc}
\usetheme{Madrid}
\usecolortheme{default}
\setbeamertemplate{enumerate items}[default]
\setbeamercolor*{structure}{bg=white,fg=black}
% \setbeamercolor*{palette primary}{use=structure,fg=white,bg=structure.fg}
% \setbeamercolor*{palette secondary}{use=structure,fg=white,bg=structure.fg!75}
% \setbeamercolor*{palette tertiary}{use=structure,fg=white,bg=structure.fg!50!black}
% \setbeamercolor*{palette quaternary}{fg=white,bg=black}
% \setbeamercolor{section in toc}{fg=black,bg=white}
% \setbeamercolor{alerted text}{use=structure,fg=structure.fg!50!black!80!black}
% \setbeamercolor{frametitle}{bg=black,fg=white}
% \setbeamercolor{titlelike}{parent=palette primary,fg=structure.fg!50!black}
% \setbeamercolor{frametitle}{bg=gray!10!white,fg=black}
% \setbeamercolor*{titlelike}{parent=palette primary}
% \setbeamercolor{block title example}{bg=black,fg=white}
% \usepackage{times,url}
% \setbeamertemplate{footline}[frame number]
% \setbeamertemplate{footline}[frame number]{}
\setbeamertemplate{footline}{}
\setbeamertemplate{footline}
% {
% \leavevmode%
% \hbox{%
% \begin{beamercolorbox}[wd=.333333\paperwidth,ht=2.25ex,dp=1ex,center]{author in head/foot}%
% \usebeamerfont{author in head/foot}\insertsection
% \end{beamercolorbox}%
% \begin{beamercolorbox}[wd=.333333\paperwidth,ht=2.25ex,dp=1ex,center]{title in head/foot}%
% \usebeamerfont{title in head/foot}\insertsubsection
% \end{beamercolorbox}%
% \begin{beamercolorbox}[wd=.333333\paperwidth,ht=2.25ex,dp=1ex,right]{date in head/foot}%
% \usebeamerfont{date in head/foot}\insertshortdate{}\hspace*{2em}
% \insertframenumber{} / \inserttotalframenumber\hspace*{2ex}
% \end{beamercolorbox}}%
% \vskip0pt%
% }
%------------------------------------------------------------
%This block of code defines the information to appear in the
%Title page
\title[About Beamer] %optional
{About the Beamer class in presentation making}
\subtitle{A short story}
\author[Arthur, Doe] % (optional)
{A.~B.~Arthur\inst{1} \and J.~Doe\inst{2}}
\institute[VFU] % (optional)
{
\inst{1}%
Faculty of Physics\\
Very Famous University
\and
\inst{2}%
Faculty of Chemistry\\
Very Famous University
}
\date[VLC 2021] % (optional)
{Very Large Conference, April 2021}
% 右下角使用logo的方式
% \logo{\includegraphics[height=1cm]{overleaf-logo}}
%End of title page configuration block
%------------------------------------------------------------
%------------------------------------------------------------
%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}
%The next statement creates the title page.
\frame{\titlepage}
%---------------------------------------------------------
%This block of code is for the table of contents after
%the title page
\begin{frame}
\frametitle{Table of Contents}
\tableofcontents
\end{frame}
%---------------------------------------------------------
\section{First section}
%---------------------------------------------------------
%Changing visivility of the text
\begin{frame}
\frametitle{Sample frame title}
This is a text in second frame. For the sake of showing an example.
\begin{itemize}
\item<1-> Text visible on slide 1
\item<2-> Text visible on slide 2
\item<3> Text visible on slides 3
\item<4-> Text visible on slide 4
\end{itemize}
\end{frame}
%---------------------------------------------------------
%---------------------------------------------------------
%Example of the \pause command
\begin{frame}
In this slide \pause
the text will be partially visible \pause
And finally everything will be there
\end{frame}
%---------------------------------------------------------
\section{Second section}
%---------------------------------------------------------
%Highlighting text
\begin{frame}
\frametitle{Sample frame title}
In this slide, some important text will be
\alert{highlighted} because it's important.
Please, don't abuse it.
\begin{block}{Remark}
Sample text
\end{block}
\begin{alertblock}{Important theorem}
Sample text in red box
\end{alertblock}
\begin{examples}
Sample text in green box. The title of the block is ``Examples".
\end{examples}
\end{frame}
%---------------------------------------------------------
%---------------------------------------------------------
%Two columns
\begin{frame}
\frametitle{Two-column slide}
\begin{columns}
\column{0.5\textwidth}
This is a text in first column.
$$E=mc^2$$
\begin{itemize}
\item First item
\item Second item
\end{itemize}
\column{0.5\textwidth}
This text will be in the second column
and on a second tought this is a nice looking
layout in some cases.
\end{columns}
\end{frame}
%---------------------------------------------------------
\end{document}