ID:157317
 
What I need is a proc that makes the NPC wander around randomly and when it comes within 4 tiles of a usr it will walk towards him/her. I read the help and looked at a few demos and don't understand each particular line of the proc so I can't modify it.
When you do not manage to understand something, it is often quite useful to start working through the basics.
Equipped with that fundamental knowledge, you can tackle on the quest and if you stumble upon an unknown foe, look up the detailed description in the reference.
On a side-note, you have a rather 'usr unfriendly' (pun intended) misunderstanding on the term usr it would seem from your description.

On a more detailed hint, you likely want to look into looping constructs, functionality to easily find the distance of objects and some way to move an object towards another one.