startup.lua

shell.run("clear")
print("overflow protection")

rednet.open("left")
local storage = peripheral.wrap("bottom")
local protocol = "andesite_overflow"

while true do
    if (#storage.list() / storage.size()) > 0.90 then
        rednet.broadcast("block", protocol)

        shell.run("clear")
        print("blocking...")
    else
        rednet.broadcast("allow", protocol)

        shell.run("clear")
        print("allowing...")
    end

    sleep(5)
end