Dupe skript help

[qulh1]

is it possible for me to script it so players cant dupe a shulker box if there is a certain item in there 

my current script is this,

command /dupe:
    trigger:
        if player's held item is air:
            send "no duping air"
        if player's held item is red dye:
            send "nice try buddy-o"
            stop
        if player's held item is dragon egg:
            send "nice try buddy-o"
            stop
        if player's held item is Chorus Flower:
            send "you may not dupe this item"
            stop
        if player's held item is Music Disc:
            send "you may not dupe this item"
            stop
        if player's held item is Totem of undying:
            send "you may not dupe this item"
            stop
        set {_item} to player's tool
        give {_item} to player
        send "&6&lDuplicated &e&l%player's tool%&6&l!" to player

 

[SkripterMan]

Hey there, to prevent people from duping shulkers you would need to block all shulker colors.

 

if player's held item is black shulker or green shulker or ect:
    #code

[Zoytax]

3 hours ago, SkripterMan said:

Hey there, to prevent people from duping shulkers you would need to block all shulker colors.

 

if player's held item is black shulker or green shulker or ect:
    #code

pretty sure you could do

if player's tool is any shulker box:

 

[SkripterMan]

6 hours ago, Zoytax said:

 

if player's tool is any shulker box:

 

Really? Wish I knew this a long time ago

[Frecklestainer]

1 hour ago, SkripterMan said:

Really? Wish I knew this a long time ago

works for most items

any wool, any sword, any leather chestplate