options:
    coal: 1
    diamond: 5

command /sell:
    trigger:
        if amount of coal in player's inventory is less than 1:
            if amount of diamond in player's inventory is less than 1:
                send "&e(!) Please obtain some blocks before selling"
                stop
        set {_coal} to number of coal in player's inventory
        set {_diamond} to number of diamond in player's inventory
        set {_value1} to {@coal} * {_coal}
        set {_value2} to {@diamond} * {_diamond}
        set {_money1} to {_coal}
        set {_money2} to {_diamond}
        set {blocks} to {_value2} + {_value1}
        set {_money} to {_money2} + {_money1}
        remove all diamond and coal from player's inventory
        add {blocks} to player's balance
        send ""
        send "&e(!) Sold x%{_money}% items for a total of $%{blocks}%"
        stop