[HELP] A Day/Night System using Common Event and without scripts

[Jin_Axl]

I'm trying to make a Day/Night System by myself, but I can't cause it to work properly, and I dunnon how to fix.
Let me first introduce my method :
I created 4 switches : Day, Noon, Night, Midnight and put in a Loop :
Day -> 4 minutes -> Noon -> Tint Screen : a brighter screen -> 4 minutes -> Night -> Tint Screen : a fading blue screen -> 4 minutes -> Midnight -> Tint Screen : a dark blue screen -> 4 minutes -> Day >< Repeat again !
Trigger : Parallel Process

And from this point I encounter 2 problem :
- Maybe I'm not used to the Control Timer command, so it caused the screen to change color rapidly, not after every 4 minutes as I desired 
- I wonder if I leave a map which this Event's processing and enter another map, how can I cause the time to flow correctly instead of roll over again ? ( Ex : I'm in Night in map A, and when I leave map A and enter map B, the Event return to Day )

Maybe my method was wrong at the beginning, I'm not too sure about it .......

All help are apprenciated.