How to Implement Production boost for unit kills?

[AfricanManBeast]

Is there any way to implement that, each unit kill grants a small production boost in every city, similar to the jfd franklin rooseveelt mod and the production or gold choice boost for each social policy? I need to learn how to implement that into the xml if possible please.

 

[Enginseer]

Lua only through GameEvents.UnitPreKill and that GameEvent is very difficult to utilize for Lua beginners.

 

[AfricanManBeast]

Lua only through GameEvents.UnitPreKill and that GameEvent is very difficult to utilize for Lua beginners.

Is there any tutorial for that specific lua coding so that I can implement it in my mod? Sorry but I'd really like an answer. Thank you.