digraph G { 
    rankdir = "LR";     /* Von links nach rechts */
    A -> B1 [label = "0,2"];
    A -> B2 [label = "0,8"];
    B1 -> C1 [label = ""];
    B1 -> C2 [label = ""];
    B2 -> D1 [label = ""];
    B2 -> D2 [label = ""];
   B1 [label="rot"];
   B2 [label="weiss"];
   C1 [label="rot"];
   C2 [label="weiss"];
   D1 [label="rot"];
   D2 [label="weiss"];
  
   A [label = ""];
}