documentclass[presentation]{beamer}
usepackage[english]{babel}
usetheme{Singapore}
useoutertheme{sidebar}
usecolortheme{rose}
setbeamercovered{transparent}
beamertemplatenavigationsymbolsempty
begin{document}
section{Section1}
subsection{Subsection1}
begin{frame}
First frame without title.
end{frame}
subsection{Subsection2}
begin{frame}
Second frame without title.
end{frame}
section{Section2}
subsection{Subsection1}
begin{frame}
Third frame without title.
end{frame}
subsection{Subsection2}
begin{frame}
Fourth frame without title.
end{frame}
end{document}

├── blank
│   ├── defaults
│   ├── files
│   ├── handlers
│   ├── LICENSE
│   ├── meta
│   ├── README.md
│   ├── tasks
│   ├── templates
│   └── vars
└── Blank
    ├── ansible.cfg
    ├── dev
    │   ├── group_vars
    │   │   └── all
    │   └── hosts
    ├── LICENSE
    ├── plays
    ├── prod
    │   ├── group_vars
    │   │   └── all
    │   └── hosts
    ├── README.md
    ├── requirements.yml
    ├── roles
    │   ├── external
    │   └── internal
    │       └── blank
    └── site.yml