Unit placment equal to lumber/gold?

[Ynklig]

Allright, I´m trying to make a map where mainly you have an army of one man ( Name of units: Army of Footmans ), running around till you see another person with one. When they collied ( one attack the other one ) you will get an army equal to you gold/lumber in an arena. ( They will not fight at the exakt location where they met ). Both teams ( lets take blue and red ) will get as many footmens as you have in gold/lumber.

Example

Red runs around in the wilderness with the footman "Army of Footmans" when he suddenly run into Blue with the same footman. Blue charges into Red and the battle begins, Blue got 27gold (= 27 footmans ), Red got 43gold (= 43 footmans ).

Anyone know how to do this? Please respond if there is something you dont understand. Thanks

 

[Drunken_God]

check if the units come near each other and then create gold of player units