% Create a sciposter with a size of 420 x 594 (DIN A 2)
% \documentclass[a2, plainboxedsections, draft]{sciposter}
% \documentclass[a2, plainboxedsections]{sciposter}
\documentclass[a2, plainboxedsections, final]{sciposter}

% Import Packages
\usepackage{multicol}   % Use multiple columns
\columnsep=2cm        % Space between columns
\columnseprule=1pt      % Width of the line inbetween the columns

\usepackage{tikz}       % Nice Graphs
\usetikzlibrary{arrows.meta}
\tikzset{>={Latex[width=3mm,length=3mm]}}

\usepackage{listings}   % Code
\usepackage{array}      % Nice tables
\usepackage{times}      % Times New Roman
\usepackage{graphicx}   % Insert Images
\usepackage[english,ngerman]{babel}     % German symbols (ä, ö, ü, ß)
\usepackage[utf8]{inputenc}             % UTF-8

% title
\title{Galaxy Generation}               % Title of the Project
\author{}              % Name of the author
\institute{}  % Institute
\email{}     % Email
%\leftlogo[1.25]{figs/galaxy}            % Logo left of the title
%\rightlogo[1]{figs/logos_box}           % Logo right of the title

% Custom section header style
\usepackage{sectsty}
\sectionfont{\color{black}\itshape\selectfont\sectionrule{0pt}{0pt}{-4pt}{1pt}}

% footnote
\conference{\\ \textbf{Jugend Forscht 2018}, Emile Hansmaennel, Theodor-Fliedner-Gymnasium}

% Rest
\setmargins[2cm] % Page Margin

\begin{document}
  \maketitle

  \begin{tikzpicture}
    \node[draw] (galaxy) {galaxy};
    \node[right of=galaxy, xshift=10cm, draw] (db_actions) {db actions};
    \node[below of=db_actions, yshift=-5cm, draw] (manager) {manager};
    \node[below left of=manager, yshift=-5cm, xshift=-5cm, draw] (simulator1) {simulator};
    \node[below of=manager, yshift=-5cm, draw] (simulator2) {simulator};
    \node[below right of=manager, yshift=-5cm, xshift=5cm, draw] (simulator3) {simulator};
    \node[right of=db_actions, xshift=5cm, draw] (database) {database};

    \draw[->] (galaxy) -- (db_actions);

    \draw[->] (manager) to[bend right] node[right, text width=2.5cm] {get a list\\of stars} (db_actions);
    \draw[->] (db_actions) -- (database);

    \draw[->] (simulator1) -- (manager);
    \draw[->] (simulator2) -- (manager);
    \draw[->] (simulator3) -- (manager);

    \draw[<->] (simulator1) to[bend right] (database);
    \draw[<->] (simulator2) to[bend right] (database);

    \draw[->] (simulator1) to[bend left] (db_actions);
    \draw[->] (simulator2) to[bend left] (db_actions);

  \end{tikzpicture}

\end{document}