---
title: 'Execute callback workflow'
weight: 66
---

Return to [Step Functions](https://console.aws.amazon.com/states/home) and start a new execution of the **WaitForCallbackStateMachine** using the default input. This time you will notice that the state machine completes its execution because the Lambda function has implemented the callback.

![Module 4 Workflow](/static/img/module-4/modified-workflow.png)

::alert[**Congratulations!** You have executed a state machine using the **Wait for Callback** pattern.]{type="success"}