Presentation Beamer [title page]

Presentation Beamer [title page]

I want to make a cover page as the attached figure. the problem is that the beamer has, by default, the marcos prédifinies: \ author {} \ title {} ', ... and their location is fixed by default. Could you help me?
Here is my code:
\title[Short Paper Title] 
{presentation}

\subtitle
{About some things}

\author
 { Author}


\institute
{
Department of Computer Science\\
University of Somewhere
}

\date
 {\today}