Mr.Welldone

I want to create Mugen stage while the Mugen stage goes darker just like Marvel VS Capcom's Rock Dune do. So, when I was playing Marvel VS Capcom on Mame and Marvel VS SNK on Mugen, but I saw Rock Dune fades from day into an evening and fades from evening into the night when the sky goes darker. Therefore, I got the Central Park daytime, Central Park evening and Central Park night. I want to create a new stage when the stage turns the day into the dark sky like a night. Check these images out what I made them for Mugen Stage Creation:
But, I want to do it just like this, Marvel VS Capcom Rock Dune Mugen Stage while it turns dark. Check this out and see:
 
 
And also I want doing the same thing as the stage 1 on The Revenge of Shinobi on Sega Genesis day fades into the night. Check this out:
Please, I really need your help. How can I create Mugen stage while the Mugen Stage goes darker?
Thank you.
(No Rude Answers)