graphe en langage DOT basique

strict digraph  {
"(4.0,3.0)" -> "(4.0,4.0)"
"(4.0,3.0)" -> "(4.0,2.0)"
"(4.0,2.0)" -> "(3.0,2.0)"
"(3.0,2.0)" -> "(2.0,3.0)" 
"(2.0,3.0)" -> "(1.0,2.0)"
"(1.0,2.0)" -> "(1.0,1.0)" 
"(1.0,1.0)" -> "(0.0,0.0)"
"(3.0,4.0)" -> "(2.0,3.0)" 
"(2.0,4.0)" -> "(2.0,3.0)" 
"(3.0,2.0)" -> "(2.0,1.0)"
"(3.0,1.0)" -> "(2.0,1.0)"
"(2.0,1.0)" -> "(1.0,1.0)"
"(1.0,4.0)" -> "(1.0,3.0)"
"(1.0,3.0)" -> "(1.0,2.0)"
}