Area of effect?

Is there any way to make a procedure happen with a specific range?

Like I put the sweep attack on some armor and want to make the particles damage mobs but I can't figure out how to do it.

I think there's a topic like this somewhere but I don't know.

I'm pretty sure it has something to do with the "Check for block in6x6x6" template.

If anyone could tell how I would do this I would be very appreciative.

:)