\documentclass{standalone}

\usepackage{tikz}
\usepackage{shapes}

\begin{document}
\begin{tikzpicture}
\grid{10}{10}{(-0.5,-0.5)}

\cross{teal}{(5,5)}
\cross{teal}{(4,2)}
\cross{teal}{(7,2)}
\cross{teal}{(3,8)}
\cross{teal}{(1,7)}
\end{tikzpicture}
\end{document}