KOD:

command /osiagniecia:
    aliases: /os
    trigger:
        open chest with 3 rows named "&aOsiagniecia" to player
        loop 27 times:
            set slot loop-number - 1 of player's current inventory to black stained glass pane named " "
        if {osiagniecia::lista::%player%::*} doesn't contain "osiagniecieStone":    
            if {osiagniecia::wykopanyStone::%player%} is not set:
                set {osiagniecia::wykopanyStone::%player%} to 0
        if {osiagniecia::lista::%player%::*} contains "osiagniecieStone":
            set slot 13 of player's current inventory to stone named "&2Wykop 100k stone" with lore "&aJuz zdobyles te osiagniecie!"
            stop
        if {osiagniecia::wykopanyStone::%player%} is less than 100000:
            set slot 13 of player's current inventory to stone named "&cWykop 100k stone" with lore "&7Musisz wykopac &6100k &7stone," and "&7aby moc odebrac nagrode!" and "" and "&7Twoj postep: &6%{osiagniecia::wykopanyStone::%player%}%&e/&6100000"
            stop
        set slot 13 of player's current inventory to stone named "&aWykop 100k stone" with lore "&aWykopales &6100k &astone!" and "" and "&7Kliknij, aby odebrac &anagrode&7!"

on inventory click:
        if "%inventory name of player's current inventory%" is not "&aOsiagniecia":
        stop
        if clicked inventory is player's inventory:
        stop
        cancel event
        if clicked slot is 13:
        if {osiagniecia::lista::%player%::*} contains "osiagniecieStone":
                send "&cJuz odebrales nagrode za to osiagniecie!" to player
                stop
        if {osiagniecia::wykopanyStone::%player%} is less than 100000:
                send "&cNie mozesz odebrac nagrody za to osiagniecie!" to player
                stop
        give player 1 diamond pickaxe of efficiency 6, unbreaking 3, fortune 3
        add "osiagniecieStone" to {osiagniecia::lista::%player%::*}
        clear {osiagniecia::wykopanyStone::%player%}
        close player's inventory
        send "&aOdebrales nagrode za osiagniecie!" to player
        
on break of stone:
    if {osiagniecia::lista::%player%::*} contains "osiagniecieStone":
        stop
    add 1 to {osiagniecia::wykopanyStone::%player%}
    if {osiagniecia::wykopanyStone::%player%} is 100000:
        send "&aZdobyles nowe osiagniecie! Sprawdz je pod &e/osiagniecia&a!" to player

KONSOLA:

[18:29:56 INFO]: [Skript] Reloading os.sk...
[18:29:56 WARN]: Empty configuration section! You might want to indent one or more of the subsequent lines to make them belong to this section or remove the colon at the end of the line if you don't want this line to start a section. (os.sk, line 19: if "%inventory name of player's current inventory%" is not "&aOsiagniecia":')
[18:29:56 WARN]: Empty configuration section! You might want to indent one or more of the subsequent lines to make them belong to this section or remove the colon at the end of the line if you don't want this line to start a section. (os.sk, line 21: if clicked inventory is player's inventory:')
[18:29:56 WARN]: Empty configuration section! You might want to indent one or more of the subsequent lines to make them belong to this section or remove the colon at the end of the line if you don't want this line to start a section. (os.sk, line 24: if clicked slot is 13:')
[18:29:56 ERROR]: #!#!
[18:29:56 ERROR]: #!#! [Skript] Severe Error:
[18:29:56 ERROR]: #!#! Could not load os.sk
[18:29:56 ERROR]: #!#!
[18:29:56 ERROR]: #!#! Something went horribly wrong with Skript.
[18:29:56 ERROR]: #!#! This issue is NOT your fault! You probably can't fix it yourself, either.
[18:29:56 ERROR]: #!#! Your Minecraft version or server software appears to be unsupported by Skript (bensku's version).
[18:29:56 ERROR]: #!#! Currently only supported servers are Spigot and its forks for Minecraft 1.9 or newer.
[18:29:56 ERROR]: #!#! Other versions might work, but since you're getting this error message something is NOT working,
[18:29:56 ERROR]: #!#! nor it will work, unless you switch to supported platform.
[18:29:56 ERROR]: #!#! Issue tracker: https://github.com/SkriptLang/Skript/issues (only if you know what you're doing!)
[18:29:56 ERROR]: #!#!
[18:29:56 ERROR]: #!#! Stack trace:
[18:29:56 ERROR]: #!#! ch.njol.skript.SkriptAPIException: No class info found for lambda
[18:29:56 ERROR]: #!#!     at ch.njol.skript.registrations.Classes.getClassInfo(Classes.java:263)
[18:29:56 ERROR]: #!#!     at ch.njol.skript.lang.SkriptParser.createExprInfo(SkriptParser.java:1804)
[18:29:56 ERROR]: #!#!     at ch.njol.skript.lang.SkriptParser.getExprInfo(SkriptParser.java:1771)
[18:29:56 ERROR]: #!#!     at ch.njol.skript.lang.SkriptParser.parse_i(SkriptParser.java:1519)
[18:29:56 ERROR]: #!#!     at ch.njol.skript.lang.SkriptParser.parse(SkriptParser.java:225)
[18:29:56 ERROR]: #!#!     at ch.njol.skript.lang.SkriptParser.parse(SkriptParser.java:180)
[18:29:56 ERROR]: #!#!     at ch.njol.skript.lang.SkriptParser.parseSingleExpr(SkriptParser.java:495)
[18:29:56 ERROR]: #!#!     at ch.njol.skript.lang.SkriptParser.parseExpression(SkriptParser.java:814)
[18:29:56 ERROR]: #!#!     at ch.njol.skript.lang.SkriptParser.parse_i(SkriptParser.java:1535)
[18:29:56 ERROR]: #!#!     at ch.njol.skript.lang.SkriptParser.parse_i(SkriptParser.java:1492)
[18:29:56 ERROR]: #!#!     at ch.njol.skript.lang.SkriptParser.parse_i(SkriptParser.java:1531)
[18:29:56 ERROR]: #!#!     at ch.njol.skript.lang.SkriptParser.parse_i(SkriptParser.java:1492)
[18:29:56 ERROR]: #!#!     at ch.njol.skript.lang.SkriptParser.parse_i(SkriptParser.java:1492)
[18:29:56 ERROR]: #!#!     at ch.njol.skript.lang.SkriptParser.parse(SkriptParser.java:225)
[18:29:56 ERROR]: #!#!     at ch.njol.skript.lang.SkriptParser.parse(SkriptParser.java:180)
[18:29:56 ERROR]: #!#!     at ch.njol.skript.lang.Statement.parse(Statement.java:59)
[18:29:56 ERROR]: #!#!     at ch.njol.skript.ScriptLoader.loadItems(ScriptLoader.java:972)
[18:29:56 ERROR]: #!#!     at ch.njol.skript.command.Commands.loadCommand(Commands.java:500)
[18:29:56 ERROR]: #!#!     at ch.njol.skript.ScriptLoader.loadScript(ScriptLoader.java:621)
[18:29:56 ERROR]: #!#!     at ch.njol.skript.ScriptLoader.lambda$1(ScriptLoader.java:389)
[18:29:56 ERROR]: #!#!     at ch.njol.skript.ScriptLoader.loadScripts(ScriptLoader.java:401)
[18:29:56 ERROR]: #!#!     at ch.njol.skript.ScriptLoader.loadScripts(ScriptLoader.java:434)
[18:29:56 ERROR]: #!#!     at ch.njol.skript.SkriptCommand.onCommand(SkriptCommand.java:181)
[18:29:56 ERROR]: #!#!     at org.bukkit.command.PluginCommand.execute(PluginCommand.java:44)
[18:29:56 ERROR]: #!#!     at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:141)
[18:29:56 ERROR]: #!#!     at org.bukkit.craftbukkit.v1_8_R3.CraftServer.dispatchCommand(CraftServer.java:641)
[18:29:56 ERROR]: #!#!     at org.bukkit.craftbukkit.v1_8_R3.CraftServer.dispatchServerCommand(CraftServer.java:627)
[18:29:56 ERROR]: #!#!     at net.minecraft.server.v1_8_R3.DedicatedServer.aO(DedicatedServer.java:412)
[18:29:56 ERROR]: #!#!     at net.minecraft.server.v1_8_R3.DedicatedServer.B(DedicatedServer.java:375)
[18:29:56 ERROR]: #!#!     at net.minecraft.server.v1_8_R3.MinecraftServer.A(MinecraftServer.java:654)
[18:29:56 ERROR]: #!#!     at net.minecraft.server.v1_8_R3.MinecraftServer.run(MinecraftServer.java:557)
[18:29:56 ERROR]: #!#!     at java.lang.Thread.run(Thread.java:748)
[18:29:56 ERROR]: #!#!
[18:29:56 ERROR]: #!#! Version Information:
[18:29:56 ERROR]: #!#!   Skript: 2.2-dev36
[18:29:56 ERROR]: #!#!   Bukkit: 1.8.8-R0.1-SNAPSHOT
[18:29:56 ERROR]: #!#!   Minecraft: 1.8.8
[18:29:56 ERROR]: #!#!   Java: 1.8.0_202 (Java HotSpot(TM) 64-Bit Server VM 25.202-b08)
[18:29:56 ERROR]: #!#!   OS: Linux amd64 3.10.0-1062.1.1.el7.x86_64
[18:29:56 ERROR]: #!#!
[18:29:56 ERROR]: #!#! Server platform: Spigot
[18:29:56 ERROR]: #!#!
[18:29:56 ERROR]: #!#! Current node: open chest with 3 rows named "&aOsiagniecia" to player (os.sk, line 4)
[18:29:56 ERROR]: #!#! Current item: null
[18:29:56 ERROR]: #!#!
[18:29:56 ERROR]: #!#! Thread: Server thread
[18:29:56 ERROR]: #!#!
[18:29:56 ERROR]: #!#! Language: english
[18:29:56 ERROR]: #!#! Link parse mode: DISABLED
[18:29:56 ERROR]: #!#!
[18:29:56 ERROR]: #!#! End of Error.
[18:29:56 ERROR]: #!#!
[18:29:56 INFO]: [Skript] Successfully reloaded os.sk.