Well, I'm pretty new to construct 2 still so your instructions are a bit hard for me to follow.
I can't find the first condition in construct 2. I reckon it's using the system condition but I can't find it.
The second part about the timer is the most confusing and what troubles me, I can't work it out.
The screenshot I've added shows what I have at the moment but the speed at which it spawns will at some point reach an impossible speed and the game starts lagging..
If it's not enough information I'll add the .capx.
Anyway thanks for commenting