Moist_Plasma:
I updated post 13 with the code information.
It is very hard to follow the conversation when you make substantial changes to earlier Replies. Correcting typos is fine. Otherwise at least make it very clear what you have changed.
Your description reads to me like a description that is written by someone who knows how to solve the problem. To my mind the whole purpose of neural networks is to let the system find solutions which are not obvious to the programmer. That's why I think your goal for this project is too simple - it is not forcing you to think sufficiently and consequently I think you will arrive at a narrow solution to the problem that really does not provide a platform from which to build more complex systems.
What about a system that turns towards the brightest light and, when the light goes off, seeks another light but if the first light comes on again it immediately returns to it and next time it goes off it stays in position and waits for it to come back on. But does not wait forever.
Just my 3 cents ...
...R