\documentclass{standalone}

\usepackage{tikz}
\usepackage{shapes}

\begin{document}
\begin{tikzpicture}
\grid9{10}{(-4,-4)}
\cross{cyan}{(0,0)}
\cross{cyan}{(1,2)}
\cross{magenta}{(2,4)}
\cross{magenta}{(2,-1)}
\cross{magenta}{(3,1)}
\cross{magenta}{(-1,-2)}
\cross{magenta}{(-2,1)}
\cross{magenta}{(-1,3)}
\end{tikzpicture}
\end{document}