digraph {
graph [bgcolor=transparent;dpi=72];
A -> B
B -> C
C -> D
D -> E
D -> F
D -> G
D -> H
Brot -> Drachenzucht
"A" [ shape=box];
"B" [ shape=oval];
"C" [ shape=oval];
"D" [ shape=house;penwidth=2 ];
"E" [ style=filled,fillcolor=palegreen];
"F" [ shape=house,style=filled,fillcolor=green;penwidth=2];
}