[ Aachen ] { offset: 0,2; origin: Hannover; }
[ Berlin ] { offset: 2,0; origin: Aachen; }
[ Cuxhaven ] { offset: 4,0; origin: Aachen; }
[ Hannover ] { flow: down; }
[ Zwickau ] { offset: 2,-2; origin: Hannover; }

[ Hannover ] --> { start: south; } [ Aachen ]
[ Hannover ] --> { start: south; } [ Berlin ]
[ Hannover ] --> { start: south; } [ Cuxhaven ]
[ Aachen ] --> { end: south, 0; start: south; } [ Zwickau ]
[ Berlin ] --> { end: south, 0; start: south; } [ Zwickau ]
[ Cuxhaven ] --> { end: south, 0; start: south; } [ Zwickau ]