barrel.lua

local mon = peripheral.find("monitor")
local barrel = peripheral.find("sophisticatedstorage:barrel")

function PrintBarrel()
    mon.clear()
    mon.setCursorPos(1,1)
    i = 1
    for slot, item in pairs(barrel.list()) do
        mon.write(("%d x %s in slot %d"):format(item.count, item.name, slot))
        i = i + 1
        mon.setCursorPos(1,i)
    end

end

while true do
    PrintBarrel()
    sleep(1)
end