[ B ] { offset: 40,0; origin: A; }
[ C ] { offset: 20,-20; origin: A; }
[ D ] { offset: 0,40; origin: C; }
[ A ] --> { style: invisible; } [ B ]
[ C ] - > [ D ]
[ B ] { offset: 40,0; origin: A; }
[ C ] { offset: 20,-20; origin: A; }
[ D ] { offset: 0,40; origin: C; }
[ A ] --> { style: invisible; } [ B ]
[ C ] - > [ D ]