items.lua

local inputChest = peripheral.wrap("right")
local badItemsChest = peripheral.wrap("left")
local goodItemsChest = peripheral.wrap("back")

while true do
    for slot, item in pairs(inputChest.list()) do

        local itemDetails = inputChest.getItemDetail(slot)

        if itemDetails.nbt then
            inputChest.pushItems(peripheral.getName(badItemsChest), slot)
        else
            inputChest.pushItems(peripheral.getName(goodItemsChest), slot)
        end

    end
end