Does Someone know a tutorial dor flickering light for a broken down buildijg or something like that

You can use targetname > generic_pulsing

Open the prefab raw/map_source/prefabs/see1_light_exp.map
select a light and green box (info null) that are connected. Make sure the light has a kvp of targetname fire_flicker.
Press ctrl c to copy. Or edit...copy.
Open your map and paste by pressing ctrl v. Or edit...paste
Drag the light and info null (green box) to a fresh area.
Other targetname kvp can be found in _lights.gsc or _lights.csc

Or use a flickering light fx.

Il try this