after discovered how to animate what commonly in game engine is not possible to animate without script or using actions from the general dope sheet, now i can animate light and color and probably many other things when i will have the chance.
So you will be able to select or deselect a button in the pause menu to stop the cycle of day/night or let it go. you can stop it when is dark to see this scene with other eyes eheh, with these small light on the skin of monsters. I did the same with the digimon scene.