blender-portable-repo/extensions/blender_org/you_are_autosave

You Are Autosave

Show a warning when you haven't saved in a while.

This warning will get stronger in a few stages:

1. At first you'll get a red line underneath the 3D Viewport.
2. Then the entire border of the 3D Viewport gets red.
3. Then the entire 3D Viewport itself will become increasingly red.
4. You see nothing any more, as everything is red.

Save your file to be able to continue working.

Hold Ctrl+Shift+Alt (Ctrl+Shift+Option on macOS) to temporarily suppress the full redness, in case you want to inspect the state of the file before saving.