graph TD
A --- B
B-->C[fa:fa-ban forbidden]
B-->D(fa:fa-spinner);
graph TD
A[Start] --> B{Is it?};
B -- Yes --> C[OK];
C --> D[Rethink];
D --> B;
B -- No ----> E[End];
flowchart TB
c1-->a2
subgraph one
a1-->a2
end
subgraph two
b1-->b2
end
subgraph three
c1-->c2
end
one --> two
three --> two
two --> c2