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 ### Sequence of events
 Everything that has a beginning has an end. Generally, you can define the steps of an exercise using a [finite-state machine](https://en.wikipedia.org/wiki/Finite-state_machine). This means that certain events can trigger a transition from one state to another. For instance, you want the user to login in your web service, and if it was successful, you would trigger the next step by notifying the *TFW server*, which will forward your message to the *FSM* instance that evaluates your request, and finally the state change happens, and additional logic is executed to prepare the environment for the next step until the last.
 
-In the second chapter, you will find detailed description regarding each component.
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+In the third chapter, you will find detailed description regarding each component.
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