I have been trying to figure out how to have a portal on a specific panel fizzle. Overall the aim is to have the player over a pit and he has a light bridge, he has to place the light bridge on one of two panels and walk over the pit but have fizzlers parented to trains going up and down over the panels (as a visual to let the player know the portal will be fizzled) so that they kill the portal and the player needs to jump, place a portal on the adjacent panel and land on the light bridge and keep running until that one cuts off two and he needs to jump back to the previous one and so on. i hope I have gotten that across ok.

Now I know that fizzlers are triggered by the player not the portals but it is a good visual. I think what I need is trigger_portal_cleanser but I'm not sure how to make it work especially in conjunction with the fizzler visual I want.

The other option is to do it by a moving panel, which will of course kill any portal on it - but it needs to be stationary for a time so that the portal can be laid and then move to kill it.

I have been trying to figure out how to have a train start and go to one path, stop for a few seconds and then go back to the start - repeat ? but I havent gotten that to work either

What I started trying was to put an output on the train itself to reverse on next path with a delay of 2secs but that didnt work.

Possibly the way to do it would be with a logic timer telling the traisn to simply stop and start, one on count high and the other on count low.

If any of you have some insights that would be great and I'm sorry for rambling a bit.

Fish

Make a second brush of a portal cleanser the same size and location as the fizzler. Parent it. Add a timer, set it to alternate high and low. One high enable the cleanser, on low disable it. Set the timer to a short duration. That should work.