Changing Terrain and Doodads

I was trying to find a system that changes terrain type of the whole map after say 10 minutes. I used the search function and found a similar thread but all the given links which seemed to help the original poster had already been deleted.

I would really appreciate it if someone could show me how to do this...

Ok, so the map starts out with lordaeron summer. How can I make it so 10 minutes into the game, the tileset changes to lordaeron fall, then 10 minutes later, it changes to winter, then 10 minutes after THAT, changes back to summer and this cycle repeats. The screen could fade to black while the terrain changes and display the season like "Summer," "Fall," and "Winter." At the same time, when the season changes, the trees could change to match the tileset.

I realize this is probably a VERY advanced and complicated system to create but I would really appreciate it and give rep plus a very special mention in-game for your efforts. Plus, I think this system could help a lot of people.

Thanks for reading!

You could use this, it's plain jass so just copy and paste.

Hmm, that looks promising. I don't really know how to edit that system so I can make it do what I need it to. Would you mind fixing it up for me or explaining to me how? If not, it's fine I understand. +Rep for linking that though. It's still a starting point, haha.