loop 0.1s attack

local checkInterval = 60  -- seconds
local lastCheck = os.clock()

while true do
    turtle.attack()
    sleep(0.1)

    if os.clock() - lastCheck >= checkInterval then
        for slot = 1, 16 do
            turtle.select(slot)
            local item = turtle.getItemDetail()
            if item then
				turtle.dropDown()
            end
        end
        turtle.select(1)
        lastCheck = os.clock()
    end
end