Add empty slot

can anyone make a script for an item that can add empty slot to any equipment but will check if the slot is max 4slot

ex.

{
 Id: 16235
 AegisName: "Slot_Up"
 Name: "Slot Up"
 Type: 11
 Buy: 50
 Weight: 10
 Script: <" equip empty slot +1 ">
},
 

this is the same as enchanting an item

instead of adding a slot why not ask for an npc that will put the card on the second slot and so on?