.. _event_loop: ########## Event loop ########## Drawing inspiration from modern web frameworks like `React.js `_, the Lightning app runs all flows in an **event loop** (forever), which is triggered several times a second after collecting any works' state change. .. figure:: https://pl-flash-data.s3.amazonaws.com/assets_lightning/lightning_loop.gif When running an app in the cloud, the ``LightningWork`` run on different machines. LightningWork communicates any state changes to the **event loop** which re-executes the flow with the newly-collected works' state.