Thanks again, I do not know how I have not seen that part. I think that from now on I'm better at experimenting instead of coming running to the forum to ask ...
PD: These block only allows to select to objetive the own actor who owns the block or the last actor collided or created. I think it would end sooner if I could write in code directly as changing an attribute to an actor from any other actor would end almost all my problems with the game.