How does this logic work?

Can someone explain how this makes sense?

In the attached file:

flag 0 on= object enlarged
flag 0 off= object returns to small size
Every 0.5 seconds + choose object at random: turn object flag 0 on

For some reason, adding an event that flag 0 on=turn flag 0 off, the events continue to trigger. If I removed that action, the event stops triggering. Why is that?

Attachment 7248

If you just remove that flag off action and remove the "only one action when event loops" condition from event 3, then it will work without turning flags off.

The reason why it stops triggering without the flag off action is because your event is looking at the first object that has the flag on and then increasing it's scale... and that is it... forever and all eternity. Because of the "only one action" condition, it's only going to check that same object over and over. Only one action literally means only one action. So it's not gonna look through all your objects and check all their flags and adjust all their scales.

Ah! Thanks so much. I cant believe the things that slip past me sometime!