startup

local ped = peripheral.wrap("top")
local mod = peripheral.wrap("bottom")
mod.open(13)

function sendItem()
  local stack = ped.getStackInSlot(1)
  for k,v in pairs(stack) do
    print(v)
    if (v == null) then
      return null
    end
    print("Received Message... Sending: "..v)
    mod.transmit(20,25,v)
    return true
  end
end

while true do
  local event, modemSize, replyChannel, message, distance = os.pullEvent("modem_message")
  sendItem()
  sleep(1)
end