Code Magic Gem de L2Tenkai en interlude L2JOrion (Item Spawn Npc)

Hello, I bring you something that I took from a source of l2 tenkai, which is from an item that spawns some npc around the game. I only add that if the player moves these npc will be deleted, as well as if the player uses the item again I leave a video so that they can see the only thing they will have to do if that is what they want is to make the npc only see them the player who uses the item as seen in the video. If someone has an idea to improve the code, please say so, thanks

code : https://pastebin.com/yaXmxCzL