Simple AI

[Jay the Editor]

Hello. How can I make a simple AI for the units of non-human player?
The unit has the ability of blizzard. I would like the units to cast blizzard at the enemies with no allies around there when it has enough mana as the Blizzard will affect allies (purposely did it).
I would also want other units like this too which I haven't come out of it like placing land mine etc.

I would very appreciate it if you can come out with a simple GUI system that I could easily configure as I don't understand any Jass/vJass scripts.

Thanks in advanced.