> For the complete documentation index, see [llms.txt](https://giantgrey.gitbook.io/databrain/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://giantgrey.gitbook.io/databrain/add-ons/logic/control-flow-execution-in-groups.md).
# Control flow execution in groups
With Logic you can control a flow inside of a group. So you can see groups as kind of a sub-graph.
### Start a group flow
To start a flow inside of a group, make sure there's either a **OnStart** node or a **OnStartGroup** node. Then you can simply start a group flow by using the **StartGroup** node. Make sure to select the group you want to start in the node inspector.
### Stop a group flow
To stop a flow inside of a group simply use the **StopGroup** node. Make sure to select the group you want to stop in the node inspector.
example from the included demo scene: Demo_04_GroupFlow
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