documentclass{article}
begin{document}
tikzstyle{block}=[draw, circle, scale=0.15, text centered, node distance=1.5cm]
tikzstyle{line}=[draw, -latex']
usetikzlibrary{shapes.geometric}
usetikzlibrary{shapes, decorations, shadows}
usetikzlibrary{decorations.pathmorphing}
usetikzlibrary{decorations.shapes}
usetikzlibrary{fadings}
usetikzlibrary{patterns}
usetikzlibrary{calc}
begin{figure*}[!htb]
centering
resizebox{0.45textwidth}{!}{%
begin{tikzpicture}
node[block, fill=green, thin](0){}; node[block, fill=green, right of=0](0)
{};node[block, fill=green, right of=0](0){};node[block, fill=green, right of=0](0)
{};node[block, fill=green, right of=0](0){};
node[block, fill=green, below of=0](1){}; node[block, fill=green, below of=1](2){};
node[block, fill=green, left of=1](1){}; node[block, fill=green, left of=1](1)
{};node[block, fill=green, left of=1](1){}; node[block, fill=green, left of=1](1){};
node[block, fill=green, left of=2](2){}; node[block, fill=green, left of=2](2){};
node[block, fill=green, left of=2](2){}; node[block, fill=green, left of=2](2){};
end{tikzpicture}
}
caption{Network representation} label{Fig: 1}
end{figure*}
end{document}