State: Choice, Fork and Join
Pseudo-states: a fork and join drawn as bars, a choice drawn as a diamond.
state-choice-fork-and-join.mmd
stateDiagram-v2
state f <<fork>>
state j <<join>>
state c <<choice>>
[*] --> f
f --> A
f --> B
A --> c
c --> j
B --> j
j --> [*]