But the problem is, there is no interaction or zone in a decal. If you don't understand then you could look at my decal script:
;Artificial Intelligence Script
; 0-once face player
; 1-once keep angle
; 2-loop face player
; 3-loop keep angle
; 4-once face up
; 5-loop face up
; 6-character-spot-decal (at end of entity characters gun if available)
;Header
desc = Runs Decal Loop
;Triggers
:state=0:rundecal=3
:state=0:hudreset,hudx=7,hudy=33,hudimagefine=gamecore\text\detected2.dds,hudname=detected,hudhide=1,hudmake=display,state=1
:state=1,plrdistwithin=30:hudshow=detected,state=2
:state=2,timergreater=15000:hudhide=detected
;End of Script