Adding 'for loop' and threshold limit

Hello Professionals!!!

I'm an intermediate user of comsol and need some hints and suggestions out of your experiences.

1. I have to perform heat transfer simulations. The emperature of one cell (primary heat source) will increase with respect to time and the others (secondary heat source) will get affected resulting in the increase of temperature. I’ve to limit the increase in temperature of the secondary (for example 1000K) and make the temperature to jump from 1000K to 1500 K (in single step). How do I achieve this?
2. How to add ‘for loop’ in comsol. for (i=0; a[i]>=800; i++) { a(i)=1400 }