Can we create a simple button widget

I want to build a simple button widget on home screen, so when I click it, it has to trigger something in background. It's kind a Panic Button.
For illustration, please check this video:

App Inventor is not able to create widgets
But what about starting an app, trigger that "something" and close the app again?


I have already an app for it, but it looks more simpler with button widget for my use case.

probably it looks more simple, but Widgets are not possible

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Ok, understand. Thanks for your help!