anchor.diff:  #define APC_UPOVERLAY_ENVIRON1 1024
   #define APC_UPOVERLAY_ENVIRON2 2048
   #define APC_UPOVERLAY_LOCKED 4096
  +#define APC_UPOVERLAY_OPERATING 8192
   
   
   #define APC_UPDATE_ICON_COOLDOWN 200 // 20 seconds
  
positive.code: 	if(update_state <= 1)
  		update_state |= UPSTATE_ALLGOOD
  
  	if(update_state & UPSTATE_ALLGOOD)
  		if(locked)
  			update_overlay |= APC_UPOVERLAY_LOCKED
  
negative.code: 			update_overlay |= APC_UPOVERLAY_ENVIRON1
  		else if(environ==2)
  			update_overlay |= APC_UPOVERLAY_ENVIRON2
  	
  
  	var/results = 0
  	if(last_update_state == update_state && last_update_overlay == update_overlay)
  