on break:
if player's gamemode is not creative:
set {_resourceMulti} to 0
set {_random} to random integer between 0 and 100
if event-block is stone:
cancel event
drop 1 cobblestone at location of event-block
if {_random} < {_resourceMulti}:
drop 1 cobblestone at location of event-block
set event-block to gray concrete
wait 10 second
set event-block to stone