# Application Note: Dynamically Manipulating Application Signal Arrays

### Setting up the Application Signal

In order to loop through an Application Signal Array, an application signal needs to be set as an array. To do this, create an [Application Signal](../../vehicle-spy-main-menus/main-menu-scripting-and-automation/application-signals) and check the box next to 'This Application Signal is an Array'.

![](https://2396693198-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FlRJv2XDCMeZSU0VbeZlG%2Fuploads%2Fgit-blob-0a6ab17dd6999bd15055e9a01ae539a87166b06d%2FASLoop1.gif?alt=media)

Next, another Application Signal will need to be created. This second application signal will be used to set the index value of the Application Signal Array above.
