on place of diamond block:
    if {p::%player%} < 0:
        set {p::%player%} to 1
    else:
        add 1 to {p::%player%}
    send title "&6+%{p::%player%}%" to player

on break of diamond block:
    if {p::%player%} > 0:
        set {p::%player%} to -1
    else:
        remove 1 from {p::%player%}
    send title "&b-%{p::%player%}%" to player