num = 0
attack = "false"
local modem = peripheral.wrap("front")
local speaker = peripheral.wrap("bottom")

while true do

    modem.open(6)
    local a,b,c,d,msg = os.pullEvent("modem_message")
    _num = tonumber(msg)

    modem.open(7)
    local a,b,c,d,msg = os.pullEvent("modem_message")
    _attack = tostring(msg)

    if _num ~= num or _attack ~= attack then

        term.clear()
        term.setCursorPos(1,1)

        print("Skulls: ".._num)
        print("Attacking: ".._attack)

        num = _num
        attack = _attack

    elseif _num ~= num then
        speaker.playSound("minecraft:entity.player.levelup")

    elseif _attack ~= attack then
        speaker.playSound("minecraft:entity.player.attack.nodamage")

    end

end