node { shape: point; }

[ B ] { point-style: square; }
[ C ] { point-style: dot; }
[ D ] { point-style: circle; }
[ E ] { point-style: diamond; }
[ F ] { point-style: cross; }
[ G ] { shape: invisible; }
[ H ] { point-style: star; }

[ A ] --> [ B ]
[ B ] --> [ C ]
[ C ] --> [ D ]
[ D ] --> [ E ]
[ E ] --> [ F ]
[ F ] --> [ G ]
[ G ] --> [ H ]
