mob grinder turtle code

local modem = peripheral.wrap("right")
modem.open(900)

while true do
    local event, modemSide, senderChannel, replyChannel, message, senderDistance = os.pullEvent("modem_message")
    if message == "blitz" then
        turtle.select(2)
        if turtle.suck() then
            turtle.suck()
        else
            turtle.drop()
        end
    end
    if message == "enderman" then
        turtle.select(3)
        if turtle.suck() then
            turtle.suck()
        else
            turtle.drop()
        end
    end
    if message == "witch" then
        turtle.select(4)
        if turtle.suck() then
            turtle.suck()
        else
            turtle.drop()
        end
    end
    if message == "creeper" then
        turtle.select(5)
        if turtle.suck() then
            turtle.suck()
        else
            turtle.drop()
        end
    end
    if message == "witherskeleton" then
        turtle.select(6)
        if turtle.suck() then
            turtle.suck()
        else
            turtle.drop()
        end
    end
    if message == "pigman" then
        turtle.select(7)
        if turtle.suck() then
            turtle.suck()
        else
            turtle.drop()
        end
    end
    if message == "spider" then
        turtle.select(8)
        if turtle.suck() then
            turtle.suck()
        else
            turtle.drop()
        end
    end
    if message == "reboot" then
        os.reboot()
    end
    if message == "clear" then
        if turtle.suck() then
            modem.transmit(900,900,"mob spawner cleared")
        end
        turtle.suck()
    end
end