Fire Relay to brick then fire one back? And when the relay fires back toggle events enabled or something?
That would work except for the fact that I still don't know how to use relays.
I set up two blocks. The block on the left, I put emitter=laser A east (or whatever) for events, I put onActivated>fire relay east (direction of block on right) for events for the brick on the left, I put "on relay>>play sound" Straightforward, right?
Didn't work.