Need help with my script

[ANormalCoconut]

I am creating a script for a smg and I cant detect how long they hold or how many times click. basically I want a ammo capacity

on right click:
    if player is holding a soul torch named "&7&lMP5":
        player has 1 iron nugget
        remove 1 iron nugget from player
        if {holdclick::%uuid of player%} is not set:
            set {holdclick::%uuid of player%} to 0
        while {holdclick::%uuid of  player%} < 1:
            shoot arrow at speed 5
            play sound "minecraft:block.amethyst_cluster.break" to player
            play sound "minecraft:block.amethyst_cluster.place" to player
            play sound "minecraft:block.amethyst_cluster.hit" to player
            play 20 flame 1 infront player's head
            wait 1 tick
            add 1 to {holdclick::%uuid of player%}
        if {holdclick::%uuid of player%} is not set:
            stop
            delete {holdclick::%uuid of player%}
        else:
            set {holdclick::%uuid of player%} to 0

on script load:
    delete {holdclick::*}

If there's any way I can get help and solve this please tell