while true do
    os.pullEvent("redstone")
    while rs.getInput("front") do
        kill = false
        while turtle.attack() or turtle.suck() do
            kill = true
            sleep(1)
        end
        if kill == true then
            for i=1,16 do
                turtle.select(i)
                turtle.dropDown()
            end
        end
    end
end