1. **If not live, trigger `$A`** *(e.g. cycle of promo images)* 2. **When livestream begins, trigger `$B`** *(e.g. screen containing livestream)* 3. **If stream errors/fails, fallback/trigger `$C`** *(e.g. back to monitoring while displaying an "we'll be right back" promo; or back to cycle of promo images)* 4. **If stream ends, trigger `$D`** *(e.g. different cycle of promo images, or different livestream, etc)* Where `$A` - `$D` are a variety of possible triggers (layouts, commands, whatever).