Transition

[Deku]

I would like to create a skript that processes a purchase, I have reached a point but I would like to add a number to the transition code (ID), which increases every time the command is executed

command /kalskmx:
    trigger:
        if balance of player is greater than 699:       
            give 10 eggs named "&bBullets" to player
            send ""
            send "&9&lPurchase successful!"
            send ""
            wait 1 second
            send "&7Items: &9Bullets"
            send "&7Quantity: &910"
            send "&7Cost: &9700€"
            set {_IDcode} to "4653: "
            add 1 to {IDcode}               
            send "&7Purchase ID: {IDcode}"
            make console execute command "eco take %executor% 700"           
            send ""
        else:
            send "&cYou don't have enough money to complete the transition!"       
        stop