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\begin{tikzpicture}[
scale=0.4,
coarse/.style={circle,draw=black,inner sep=2pt},
fine/.style={circle,draw=black,inner sep=1pt}
]
\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,...,8}
\node[fine] at (11+0.5*\x,1+0.5*\y){ };
\draw[->,line width=0.5mm] (18,3.5) -- (20,3.5);
\foreach \x in {0,...,7}
\foreach \y in {0,...,7}
\node[coarse] at (22+\x,\y){ };
\foreach \x in {0,...,8}
\foreach \y in {0,...,8}
\node[fine] at (24+0.5*\x,1+0.5*\y){ };
\end{tikzpicture}
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