\begin{tikzpicture}[
	scale=0.4,
	coarse/.style={circle,draw=black,inner sep=2},
	fine/.style={cross out,draw=black,inner sep=1},
]

\foreach \x in {0,...,7}
	\foreach \y in {0,...,7}
		\node[coarse] at (\x,\y){ };

\draw (9,3.5) node[cross out,draw=black,line width=0.5mm,rotate=45]{};

\foreach \x in {0,...,8}
	\foreach \y in {0,...,6}
		\node[fine] at (11+0.5*\x,2+0.5*\y){ };

\draw[->,line width=0.5mm] (17.5,3.5) -- (19.5,3.5);

\foreach \x in {22,...,29}
	\foreach \y in {0,...,7}
		\node[coarse] at (\x,\y){ };

\foreach \x in {0,...,8}
	\foreach \y in {0,...,6}
		\node[fine] at (25+0.5*\x,2+0.5*\y){ };
\end{tikzpicture}