[Basic] Cyclic and AOE innate attacks

[VariousRen]

I'm building a spell for Sorcery based off Innate Attack that is a cloud of deadly gas, and I'm wondering how two modifiers are suppose to interact. The cloud does 1d6 toxic damage, is persistent, has an AOE of 16 yards, and is cyclic for 2 extra cycles.

If you're stuck standing in the cloud (or trying to run out of it), does the cyclic stack up immediately (the first round is 1d6, second is 2d6, third and the rest are 3d6) or does it only apply when you are no longer in the cloud (so 1d6 while you're in it, plus 1d6 for 2 rounds after you leave)?