\documentclass{standalone}

\usepackage{tikz}
\usepackage{shapes}

\begin{document}
\begin{tikzpicture}
  \foreach \i in {0,...,3}{
    \foreach \j in {0,...,3}{
      \cross{green}{(-2*\j,\j)++(\i,2*\i)}
    }
  }
\end{tikzpicture}
\end{document}