#adds the placed block from the player to a list variable.
on block place:
    if {game} is true:
        add event-block to {blocksgone::*}

#it should: prevent the player from breaking a block that he or another player did not place. but it does: it just doesn't let the #player break any block
on block break:
    if {game} is true:
        if event-block is not {blocksgone::*}:
            cancel event
        else if event-block is {blocksgone::*}:
            remove event-block from {blocksgone::*}


#delete the blocks placed by the player
command /deleteblockas:
    trigger:
        set all blocks at {blocksgone::*} to air
        wait 5 ticks
        clear {blocksgone::*}