To make your maps more interesting you can set up guards.

The great thing about patrols guarding, is that it makes the map seem alive. There is somebody protecting the nuclear weapons facility/prisoners/secret plans, etc.
This also makes it harder to win a single-player map, if you constantly have to be on guard for patrols. This map sets up two types of guards teams. One team is patrolling an area, the other is guarding two towers, from inside.

When the game begins, the scripting sets up the patrol to move along the waypoint path and asks the towerguards to enter the tower.

Try the map, and then take it apart in WorldBuilder to see the scripting.

Get map, zipped