書式情報を入れてみる graph sample { N0 [color=red]; N1 [color=red]; N2 [color=red]; N3 [color=red]; N4 [color=red]; N5 [color=red]; N6 [color=red]; N7 [color=red]; N8 [color=red]; N9 [color=blue]; N10 [color=blue]; N11 [color=blue]; N12 [c…