Geysers?

How would I do, rising and falling fire geysers, like the poison one's, in Poison Palace Zone, where they start at the same level, as the liquid, and shoot out of the ground, this is a gimmick for Act 2 of my first level, of my new level pack, and I must know of he proper way to do this. Also, they shoot up, WITHOUT standing on them.

There's more than one way to do it, but your best bet would be to use an FOF with a Continuous Mover effect tagged to it.

Start small. It's an advanced technique. If you rush into it you'll become confused and frustrated. Start with smaller things first.