@startuml
skinparam state {
  BackgroundColor<<choice>> LightYellow
}

[*] --> SUBMITTED

state PAID_choice <<choice>>
PAID --> PAID_choice
state SUBMITTED_choice <<choice>>
SUBMITTED --> SUBMITTED_choice

SUBMITTED -[#1E90FF,bold]-> PAID : PAY
PAID -[#1E90FF,bold]-> FULFILLED : FULFILL
SUBMITTED -[#1E90FF,bold]-> CANCELED : CANCEL [lambda]
PAID -[#1E90FF,bold]-> CANCELED : CANCEL
SUBMITTED -[#1E90FF,bold]-> SUBMITTED : ABCD
SUBMITTED_choice -[#4682B4,bold]-> PAID2 : [lambda] (order=0)
SUBMITTED_choice -[#4682B4,bold]-> PAID3 : (order=1)
PAID_choice -[#FF6347,bold]-> PAID1 : [lambda] (order=0)
PAID_choice -[#FF6347,bold]-> PAID2 : [guard1] (order=1)
PAID_choice -[#FF6347,bold]-> HAPPEN : [lambda] (order=2)
PAID_choice -[#FF6347,bold]-> PAID3 : (order=3)
PAID2 -[#1E90FF,bold]-> CANCELED
PAID3 -[#1E90FF,bold]-> CANCELED
PAID1 -[#1E90FF,bold]-> PAID1 : ABCD / lambda, action2

PAID1 --> [*]
CANCELED --> [*]
FULFILLED --> [*]
HAPPEN --> [*]
@enduml