t

on place:
    if player's held item contains "Backpack":
        cancel event

on rightclick:
    if player's held item contains "Backpack":
        make player execute command "/sell"
    else if lore of player's held item contains "Click to redeem your kits !":
        if player's gamemode is not creative or Spectator:
            remove 1 of player's held item from player's inventory
            give 1 of diamond pickaxe of efficiency 100 with no nbt named "&3&lStarter Pickaxe" lored "&7Fortune 10" to player
            give 1 of ender chest of unbreaking 10 with no nbt named "&b&lBackpack" lored "&7Right-Click to open Sell Menu !" to player

command /sell [<text>]:
    trigger:
        set {_stonev} to {Stone::%player%} * 10
        set {_coalv} to {Coal::%player%} * 15
        set {_ironv} to {Iron::%player%} * 20
        set {_goldv} to {Gold::%player%} * 25
        set {_lapisv} to {Lapis::%player%} * 30
        set {_redstonev} to {Redstone::%player%} * 35
        set {_diamondv} to {Diamond::%player%} * 40
        set {_emeraldv} to {Emerald::%player%} * 45
        set {_quartzv} to {Quartz::%player%} * 50
        set {_value} to {_stonev} + {_coalv} + {_ironv} + {_goldv} + {_lapisv} + {_redstonev} + {_diamondv} + {_emeraldv} + {_quartzv}
        set {_value} to round({_value} * 1)
        set {_value1} to split("%{_value}%")
        open virtual chest inventory named "&b&lBackpack Storage" with size 5 to player
        format gui slot 0 and 1 and 2 and 3 and 5 and 6 and 7 and 8 and 36 and 37 and 38 and 39 and 40 and 41 and 42 and 43 and 44 of player with white glass pane named "" to do Nothing
        format gui slot 4 of player with ender chest named "&b&lYour Backpack" lored "&7Value: &a$%{_value1}%" to run player command "/sellall"

command /sellall:
    trigger:
        if {Stone::%player%} + {Iron::%player%} + {Gold::%player%} + {Lapis::%player%} + {Redstone::%player%} + {Diamond::%player%} + {Emerald::%player%} + {Quartz::%player%} > 0:
            set {_value} to (({Stone::%player%} * 10) + ({Coal::%player%} * 15) + ({Iron::%player%} * 20) + ({Gold::%player%} * 25) + ({Lapis::%player%} * 30) + ({Redstone::%player%} * 35) + ({Diamond::%player%} * 40) + ({Emerald::%player%} * 45) + ({Quartz::%player%} * 50)) * {Multi::%player%}
            add {_value} to player's balance
            set {_value1} to split("%{_value}%")
            send "         &2&l&o* &a&lSell Summary &2&l&o*"
            send "&aYou &7sold your Items for &a$%{_value1}% &7!"
        else:
            send "&7[&c&lSELL&7] &cYou need to break Items before Selling !"