Static "drops" box?

I’ve been trying to figure out if there would be a way to create a spawnable box (industructable), that would spawn items every 90-180 minutes, sort of like a drop. I’m somewhat inexperienced with the devkit, so any suggestions on starting points would be helpful, if it’s even possible. I’m sort of trying to think of something to use as a “Point Capture” for PVP servers, something to create PVP that isn’t just griefing and base raiding.