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]; }