HELP ME

on right click:
    if name of event-item is "&eGenerator (&7Tier 1)":
        set {_l} to random element out of {tier1::*}
        set {_l} to "%{_l}%" parsed as item
        execute console command "/give %player% %{_l}%"
    else if event-item's name is "&eGenerator (&7Tier 2)":
        set {_x} to random integer between 1 and 2
        if {_x} = 1:
            set {_l} to random element out of {tier1::*}
            set {_l} to "%{_l}%" parsed as item type
            add {_l} to player's inventory
            execute console command "/give %player% %{_l}%"
        else if {_x} = 2:
            set {_l} to random element out of {tier2::*}
            set {_l} to "%{_l}%" parsed as item
            add {_l} to player's inventory
            execute console command "/give %player% %{_l}%"
    else if event-item's name is "&eGenerator (&7Tier 3)":
        set {_x} to random integer between 1 and 3
        if {_x} = 1:
            set {_l} to random element out of {tier1::*}
            set {_l} to "%{_l}%" parsed as item
            add {_l} to player's inventory
            execute console command "/give %player% %{_l}%"
        else if {_x} = 2:
            set {_l} to random element out of {tier2::*}
            set {_l} to "%{_l}%" parsed as item
            add {_l} to player's inventory
            execute console command "/give %player% %{_l}%"
        else if {_x} = 3:
            set {_l} to random element out of {tier3::*}
            set {_l} to "%{_l}%" parsed as item
            add {_l} to player's inventory
            execute console command "/give %player% %{_l}%"
    else if event-item's name is "&eGenerator (&7Tier 4)":
        set {_x} to random integer between 1 and 4
        if {_x} = 1:
            set {_l} to random element out of {tier1::*}
            set {_l} to "%{_l}%" parsed as item
            add {_l} to player's inventory
            execute console command "/give %player% %{_l}%"
        else if {_x} = 2:
            set {_l} to random element out of {tier2::*}
            set {_l} to "%{_l}%" parsed as item
            add {_l} to player's inventory
            execute console command "/give %player% %{_l}%"
        else if {_x} = 3:
            set {_l} to random element out of {tier3::*}
            set {_l} to "%{_l}%" parsed as item
            add {_l} to player's inventory
            execute console command "/give %player% %{_l}%"
        else if {_x} = 4:
            set {_l} to random element out of {tier4::*}
            set {_l} to "%{_l}%" parsed as item
            add {_l} to player's inventory
            execute console command "/give %player% %{_l}%"
    else if event-item's name is "&eGenerator (&7Tier 5)":
        set {_x} to random integer between 1 and 5
        if {_x} = 1:
            set {_l} to random element out of {tier1::*}
            set {_l} to "%{_l}%" parsed as item
            add {_l} to player's inventory
            execute console command "/give %player% %{_l}%"
        else if {_x} = 2:
            set {_l} to random element out of {tier2::*}
            set {_l} to "%{_l}%" parsed as item
            add {_l} to player's inventory
            execute console command "/give %player% %{_l}%"
        else if {_x} = 3:
            set {_l} to random element out of {tier3::*}
            set {_l} to "%{_l}%" parsed as item
            add {_l} to player's inventory
            execute console command "/give %player% %{_l}%"
        else if {_x} = 4:
            set {_l} to random element out of {tier4::*}
            set {_l} to "%{_l}%" parsed as item
            add {_l} to player's inventory
            execute console command "/give %player% %{_l}%"
        else if {_x} = 5:
            set {_l} to random element out of {tier5::*}
            set {_l} to "%{_l}%" parsed as item
            add {_l} to player's inventory
            execute console command "/give %player% %{_l}%"

command /add <number>:
    permission: op
    permission message: no Permissions
    trigger:
        if arg-1 = 1:
            player is not holding air
            add "%player's held item%" to {tier1::*}
            send "{@prefix} &cSucessfully added &4%player's held item% &cto the items"
        if arg-1 = 2:
            player is not holding air
            add "%player's held item%" to {tier2::*}
            send "{@prefix} &cSucessfully added &4%player's held item% &cto the items"
        if arg-1 = 3:
            player is not holding air
            add "%player's held item%" to {tier3::*}
            send "{@prefix} &cSucessfully added &4%player's held item% &cto the items"
        if arg-1 = 4:
            player is not holding air
            add "%player's held item%" to {tier4::*}
            send "{@prefix} &cSucessfully added &4%player's held item% &cto the items"
        if arg-1 = 5:
            player is not holding air
            add "%player's held item%" to {tier5::*}
            send "{@prefix} &cSucessfully added &4%player's held item% &cto the items"