capture the flag

what are some basic triggers needed to start a capture the flag map?

Oh boy...
I'm going to assume for now that you know the basics of triggering.

1. Some sort of hero selection system. (If you want.)
2. Flag Capturing:
a. Easiest wait is to make the flag an item.
i. If unit picks up item and unit owned by player on team 1 and item is Team 1's flag, move item to center of region Team 1's Base.
ii. If unit enters region Team 2's Base and unit holding item equal to Team 1's Flag add point to team two, move Team 1's Flag to center of region Team 1's Base.
b. You can chose if one team needs both flags in order to capture it or not.
3. Scoreboard of points.

Hope that helps.