Emerald Farm Controller

    ---Simple little program to automate my Minecraft emerald farm.
    ---
    ---Basic idea: I have an infinite villager breeder feeding into a
    ---smeltery (yes, I'm a bad, bad man). This script is for the computer
    ---to monitor the smeltery and trigger the drain whenever there's more than
    ---one emerald in there. More than one so that the smeltery doesn't end up
    ---empty and stop killing villagers.

    function alarm()
            allGood=false
            redstone.setOutput("bottom",true)
            while not allGood do
                    info=smelt.getInfo()
                    allGood= (info.id==27)
            end
            redstone.setOutput("bottom",false)
    end

    smelt=peripheral.wrap("right")

    alarm()

    while true do
            info=smelt.getInfo()
     print(info.id)
            if not (info.id==27) then
                    alarm()
            elseif info.amount > 640 then
                    redstone.setOutput("back",true)
                    sleep(1)
                    redstone.setOutput("back",false)
            end
            sleep(30)
    end