Variables:
    {BlockCounter.%player%} = 0
on mine:
    if player is holding a pickaxe:
        add 1 to {BlockCounter.%player%}
    if {BlockCounter.%player%} is greater than or equal to 500:
        set {BlockCounter.%player%} to 0
        message "&bEPRevamped &8| &7» &fCongratulations, You mined 500 blocks, Here's a reward"
        make console execute "effect %player% haste 2 10"