lua turtle my autoenchant drop up

-- pastebin get 5NNztFvW startup
--   _____
--  |  ___|   _ _ __   ___
--  | |_ | | | | '_ \ / __|
--  |  _|| |_| | | | | (__
--  |_|   \__,_|_| |_|\___|
--

left = function()
    return turtle.turnLeft()
end

right = function()
    return turtle.turnRight()
end

fuel = function()
    return turtle.getFuelLevel()
end

select = function(id)
    return turtle.select(id)
end

count = function(id)
    return turtle.getItemCount(id)
end

move = function(id, nb)
    return turtle.transferTo(id, nb)
end

--   _____
--  |  ___|   _ _ __   ___
--  | |_ | | | | '_ \ / __|
--  |  _|| |_| | | | | (__
--  |_|   \__,_|_| |_|\___|
--

function init()
    if(count(16) == 0)then
        print("Pas de livre dans le slot 16")
        --return false
    end

    return true
end
function clear_inventory()
    for i = 1,15 do
        if(count(i)>0)then
            turtle.select(i)
            turtle.dropDown()
        end
    end
    select(1)
end

--  __  __       _        ____
-- |  \/  | __ _(_)_ __  / /\ \
-- | |\/| |/ _` | | '_ \| |  | |
-- | |  | | (_| | | | | | |  | |
-- |_|  |_|\__,_|_|_| |_| |  | |
--                       \_\/_/


args = { ... }
if( args[1]==null)then
    args[1] = 16
    --print("Début de 'tree', par defaut, "..args[1].." blocks")
else
    --print("Début de 'tree', "..args[1].." blocks")
end

stop=false
if(init()==false) then
    stop=true
end
xp=peripheral.wrap("right")
xp.setAutoCollect(true)
xplevel = xp.getLevels()
while(stop==false)do
    turtle.attack()
    repeat
        turtle.suck()
    until turtle.suck() == false
    turtle.attack()
    if(count(16) > 0)then
        if(xplevel ~= xp.getLevels())then
            xplevel = xp.getLevels()
            print("Level "..xplevel)
            if(xplevel > 29) then
                clear_inventory()
                select(16)
                move(1,1)
                select(1)
                xp.enchant(30,30)
                --turtle.dropDown()
                turtle.dropUp()
            end
        end
    end
    turtle.attack()
    repeat
        turtle.suck()
    until turtle.suck() == false
    turtle.attack()
    sleep(1)
    if(count(2) > 0)then
        clear_inventory()
    end

end


print('End')
if(fuel() == 0) then
  print('Ya plus de coco mon coco !')
end