Request simple map hide trigger

[wohuynia]

If posible, can any1 post a trigger for me that would hide my in game mini map terrain xD

Other thing, i need a trigger. 1st to make game play screen very dark, then after ability being casted lighter around unit(1200 range) or something.

I would be very greatful if some1 could help me with this, i spent so manny hours trying to do something with fade filters but nothing good happend -.-