/vr/ - Retro Games

Is there an ACS command or something that changes the scope to bordering sectors? For example, the player walks through a grid of sectors (though it's all just one big room), and the sector the player is in has 256 brightness, bordering sectors 128 brightness, and the remaining sectors have dark 32 brightness.

This is just an example, what I actually want though is a light that "jumps around" in a sector randomly, and to have some sort of gradient of brightness around it. Or will I have to tag every sector and make a case for them all individually? (so for a 3*3 grid I'd have a switch with 9 cases, 5*5 grid 25 cases etc.)