command /sklep:
    trigger:
       show chest with 1 row named "&8Sklep" to player
       wait 2 ticks
       set player's current inventory's slot 0 to "&f&lBeacon" with lore "&7Koszt zakupu: &c10 nolife coins"
       set player's current inventory's slot 8 with book named "&a&lSaldo" with lore "&c%{nolifeCoins::%player%}% &7nolife coins" 
on inventory click:
    if "%inventory name of player's current inventory%" contains "&8Sklep":
       if clicked slot is 0:
          cancel event
          if {nolifeCoins::%player%} >= 10:
             remove 10 from {nolifeCoins::%player%}
             give beacon to player's inventory
             send "&2* &aZakupiles beacona." to player
       if clicked slot is 8:
          cancel event