anchor.diff:  	if(!safe)
   		crush()
   	sleep(9)
  -	update_icon()
  +	update_icon(AIRLOCK_CLOSED)
   	if(visible && !glass)
   		SetOpacity(1)
   	operating = 0
  
positive.code: 	update_freelook_sight()
  	if(safe)
  		if(locate(/mob/living) in get_turf(src))
  			open()
  	return 1
  
  
negative.code: 		return 0
  	operating = 1
  
  	update_icon(AIRLOCK_OPENING)
  	src.SetOpacity(0)
  	sleep(5)
  	src.density = 0
  