private static Inventory create9LevelInv(final int min_lvl, final int has_lvl, final int xp){
        // min_lvl: das niedrigste level, das angezeigt werden soll
        // has_lvl: aktuelles level
        // xp: aktuelle xp

        final int max_lvl = min_lvl + 8;

        Inventory inv = Bukkit.createInventory(null, 45,"§1Levelübersicht§g");
        ItemStack has_item = new ItemStack(Material.LIME_STAINED_GLASS_PANE);
        ItemStack is_item = new ItemStack(Material.YELLOW_STAINED_GLASS_PANE);
        ItemStack not_item = new ItemStack(Material.RED_STAINED_GLASS_PANE);

        List<String> has_lore = new ArrayList<>();
        has_lore.add("§r");
        has_lore.add("§7Du hast dieses Level bereits erreicht.");
        has_lore.add("§r");
        has_lore.add("§7Fortschritt: §a::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::");

        List<String> not_lore = new ArrayList<>();
        not_lore.add("§r");
        not_lore.add("§7Du hast dieses Level §cnoch nicht§7 erreicht.");
        not_lore.add("§r");
        not_lore.add("§7Fortschritt: §c::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::");

        List<String> is_lore = new ArrayList<>();
        is_lore.add("§r");
        is_lore.add("§7Du hast dieses Level §cnoch nicht§7 erreicht.");
        is_lore.add("§r");

        ItemStack creds = new ItemStack(CreditManager.creditMaterial);
        ItemStack coins = new ItemStack(CoinManager.coinMaterial);

        ItemStack noth = new ItemStack(Material.WHITE_STAINED_GLASS_PANE);
        ItemStack five = new ItemStack(Material.LIGHT_GRAY_STAINED_GLASS_PANE);
        ItemStack ten = new ItemStack(Material.GRAY_STAINED_GLASS_PANE);

        ItemMeta empt = noth.getItemMeta();
        empt.setDisplayName("§r");
        noth.setItemMeta(empt);
        five.setItemMeta(empt);
        ten.setItemMeta(empt);

        for (int lvl = min_lvl; lvl <= max_lvl ; lvl++){
            if (lvl <= has_lvl){
                ItemMeta meta = has_item.getItemMeta();
                meta.setDisplayName("§aLevel §l§a§s" + lvl);
                meta.setLore(has_lore);
                has_item.setItemMeta(meta);
                // 2. Reihe = lvl - min_lvl + 9
                inv.setItem(lvl-min_lvl+9, has_item);
            }else if ((has_lvl + 1) == lvl){
                ItemMeta meta = is_item.getItemMeta();
                meta.setDisplayName("§eLevel §l§e§s" + lvl);
                String fort = "§7Fortschritt: §a";
                int prog = (int) ((float) xp / getXPNeededForLevel(has_lvl) *60);
                for (int i = 1 ; i <= 60; i++){
                    if (prog >= i){
                        fort += ":";
                    }else{
                        fort += "§c:";
                    }
                }
                is_lore.add(fort);
                meta.setLore(is_lore);
                is_item.setItemMeta(meta);
                inv.setItem(lvl-min_lvl+9,is_item);
            }else{
                ItemMeta meta = not_item.getItemMeta();
                meta.setDisplayName("§4Level §l§4§s" + lvl);
                meta.setLore(not_lore);
                not_item.setItemMeta(meta);
                // 2. Reihe = lvl - min_lvl + 9
                inv.setItem(lvl-min_lvl+9, not_item);
            }
            if (lvl != 0){
                if (lvl % 10 == 0){
                    int z = lvl / 10;
                    int cre = z *10;
                    ItemMeta meta = creds.getItemMeta();
                    meta.setDisplayName(CreditManager.creditColorCode + cre + " Credits");
                    if (lvl <= has_lvl){
                        meta.setLore(has_lore);
                    }else if ((has_lvl+1) == lvl){
                        meta.setLore(is_lore);
                    }else {
                        meta.setLore(not_lore);
                    }
                    creds.setItemMeta(meta);
                    inv.setItem(lvl-min_lvl,ten);
                    inv.setItem(lvl-min_lvl+18,creds);
                    inv.setItem(lvl-min_lvl+27,ten);
                }else if (lvl % 5 == 0){
                    // TODO: Lootkisten impl
                    inv.setItem(lvl-min_lvl,five);
                    //lootkiste
                    inv.setItem(lvl-min_lvl+27,five);
                }else{
                    final int basis = 7; // TODO: Feintuning
                    int coi = basis * lvl;
                    ItemMeta meta = coins.getItemMeta();
                    meta.setDisplayName(CoinManager.coinColorCode + coi + " Coins");
                    if (lvl <= has_lvl){
                        meta.setLore(has_lore);
                    }else if ((has_lvl+1) == lvl){
                        meta.setLore(is_lore);
                    }else {
                        meta.setLore(not_lore);
                    }
                    coins.setItemMeta(meta);
                    inv.setItem(lvl-min_lvl,noth);
                    inv.setItem(lvl-min_lvl+18,coins);
                    inv.setItem(lvl-min_lvl+27,noth);
                }
            }else{
                ItemStack no = new ItemStack(Material.BARRIER);
                ItemMeta nmeta = no.getItemMeta();
                nmeta.setDisplayName("§4Keine Belohnung für diese Stufe");
                nmeta.setLore(has_lore);
                no.setItemMeta(nmeta);
                inv.setItem(lvl-min_lvl+18,no);
            }
        }

        ItemStack prev = new ItemStack(Material.LIME_WOOL);
        ItemMeta prev_meta = prev.getItemMeta();
        prev_meta.setDisplayName("§a←");
        prev.setItemMeta(prev_meta);


        ItemStack next = new ItemStack(Material.RED_WOOL);
        ItemMeta next_meta = prev.getItemMeta();
        next_meta.setDisplayName("§4→");
        next.setItemMeta(next_meta);

        ItemStack n = new ItemStack(Material.BLACK_STAINED_GLASS_PANE);
        n.setItemMeta(empt);

        if (min_lvl > 0){
            for (int i = 36 ; i <= 39 ; i++){
                inv.setItem(i, prev);
            }
        }else{
            for (int i = 36 ; i <= 40 ; i++){
                inv.setItem(i, n);
            }
        }
        for (int i = 41 ; i <= 44 ; i++){
            inv.setItem(i, next);
        }


        return inv;
    }