Stargate Cargo Upper Distributer

local modem = peripheral.wrap("top") or error("No modem attached", 0)
modem.open(12) -- Open 43 so we can receive replies

-- And wait for a reply
local event, side, channel, replyChannel, message, distance
repeat
    event, side, channel, replyChannel, message, distance = os.pullEvent("modem_message")
until channel == 12

-- Process the received message based on its content
if message == "Iron" then
    modem.transmit(46, 12, "Preparing Package...")
    print("Starting Drop...")
    redstone.setOutput("front", true)

    os.sleep(1)

    print("Stoping Drop...")
    redstone.setOutput("front", false)

    os.sleep(3)
    modem.transmit(46, 12, "Drop-Ready")
end

shell.run("startup")