[Newbie]: Need to create similar map like....

[Velictus]

Hey, I'm new to WC3 World Editor and I've been playing around with it for about a few days. Seems really fun, but I want to get into making a map that I would like to play.

In WC3: RoC the last Undead level was where you have to defend Kel'thuzad for a certain amount of time.

I need help or a tutorial to help me make something similar to this.

Eg,

The side of the screen would say 'Wave 1', or level 1, etc.
And Low-level creeps/units would spawn and once they die, one minute later it says

Wave 2!
and same thing as Wave 1 but creeps get harder, until number 10 where a custom hero I'll make should spawn.

Any help?

 

[DeathWind]

if u make the units u want to send at the defenders, i can do the triggering? then u can look tht how they work. is tht a good idea