Randomly and smoothly change Light intensity

I’m trying to get the light intensity to change to random values within a range and smoothly but I can’t seem to figure out how to get this done below is what I currently have but it is a pre-set change to the intensity that loops. As the picture also shows I’m trying to do this so I can have a more realistic light effect from candles but I will also want to do this for fire.

Its in the docs:

Hi!

You can create two random values of intensity and animate the blending between these values.

This is result: - YouTube