countdown-symfony/config/packages/workflow.yaml

framework:
    workflows:
        countdown:
            type: 'state_machine'
            audit_trail:
                enabled: true
            marking_store:
                type: 'method'
                property: 'state'
            supports:
                - App\Entity\Counter
            initial_marking: !php/const App\Entity\Counter::STATE_READY
            places:
                - !php/const App\Entity\Counter::STATE_READY
                - !php/const App\Entity\Counter::STATE_STARTED
                - !php/const App\Entity\Counter::STATE_COMPLETED
            transitions:
                !php/const App\Entity\Counter::TRANSITION_TO_STARTED:
                    from: !php/const App\Entity\Counter::STATE_READY
                    to: !php/const App\Entity\Counter::STATE_STARTED
                !php/const App\Entity\Counter::TRANSITION_TO_COMPLETED:
                    from: !php/const App\Entity\Counter::STATE_STARTED
                    to: !php/const App\Entity\Counter::STATE_COMPLETED
                !php/const App\Entity\Counter::TRANSITION_TO_READY:
                    from: !php/const App\Entity\Counter::STATE_COMPLETED
                    to: !php/const App\Entity\Counter::STATE_READY