It is easy with jass.
You basicly have to pick all circles and add an event to a trigger that triggers when a unit enters X distence to the circle.
NO ONE USE blackchoas 's TRIGGER!
It leaks like a beaker made of air and will lag like mad if there are 100s of units and stuff on the map.
10 groupes are leaked and over 25 locations are leaked every second so it is a health hazard.
Also I do not see how this will work. . .
Stick to my method, probably safer. . .
blackchoas said:Wow. This trigger was crazy to come up with and your going to have to change all the stuff to fit with your map. Right now this trigger would not work-