Effect day night in game

cocos2d-x C++
#1

i want to code effect “day, night” in game cocos2dx.

but i don’t want how to do that:(

#2

add half transparent black layer on top of your scene?

#3

I know a game “Chaos Fighter” who uses different full-screen background image.

#4

dear dawid,

If you already have night background layer. please send me