Create a guard somewhere in your mission.
Click on 'properties' at the bottom of the screen.
Now click on the 'Add' button and select:
AI>Ability Settings>Idling: Directions
The "Idling: Directions" dialogue box contains the following fields:
Min. facing switch time
Max. facing switch time
Min. facing switch time and Max. facing switch time tell DromED how long a guard should wait before changing direction.
I believe this is measured in milliseconds, because a minimum time of 3000 and a maximum time of 6000 seem to work well.
Next we define the three directions that the guard can be facing:
Facing 1, Facing 2, and Facing 3
For each of these we can specify the heading (the angle in degrees) and (I think) the importance of the direction.
So, for example, we could have a guard who faces north, south, and west and who turns every four or five seconds, by
Min. facing switch time 3000
Max. facing switch time 6000
Finally, simply click 'Ok' and then click 'Done' and that's it!
You are not limited to North South East West, as you can specify any heading (in degrees).
The Honest Thief