Script_controller(need working example)

I wont assign script controller to some box in scene.

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cp=$camera01.pos -- some camera in scene

hp=$point01. pos      -- some helper_point is scene

icp=$point02.pos     -- another helper_point is scene

Scontr=scale_script()

box_copy.scale.controller = Scontr

Scontr.script="[distance cp hp/distance icp hp,distance cp hp/distance icp hp,distance cp hp/distance icp hp]"

?????????????????????????????????????????????????????

what I must use

(AddObject, AddNode, SetObjec,SetNode) to define cp, hp, icp in script_controller?