object OnDispenserGather(ResourceDispenser dispenser, BaseEntity entity, Item item)

        {

            if (!entity.ToPlayer()) return null;

            BasePlayer player = entity as BasePlayer;

            string name = player.displayName;

           if (dispenser.gatherType == ResourceDispenser.GatherType.Tree)

           {

           

                ShowUI(player, "Есть шанс получить семя дерева");

                int rng = Oxide.Core.Random.Range(0,100);

                if(rng == 1)

                {

                TreeConfig tree = _config.FindItemByName("Семя дерева");

                Item items = CreateItem(tree.Name,"seed.hemp", tree.Amount);

                player.GiveItem(items);

               

                }

           

           

           }

How can I make memorization of one tree, that is, I want to draw a CUI while the player beats one tree, and if he killed him or stopped beating him, then the CUI simply disappears