anchor.diff:  		add_overlay("can-open")
   	if(update & CONNECTED)
   		add_overlay("can-connector")
  -	if(update & EMPTY)
  +	if(update & LOW)
   		add_overlay("can-o0")
  -	else if(update & LOW)
  +	else if(update & MEDIUM)
   		add_overlay("can-o1")
   	else if(update & FULL)
   		add_overlay("can-o2")
  
positive.code: #undef CONNECTED
  #undef EMPTY
  #undef LOW
  #undef FULL
  #undef DANGER
  
  
negative.code: #define CONNECTED 2
  #define EMPTY 4
  #define LOW 8
  #define MEDIUM 16
  #define FULL 32
  #define DANGER 64
  /obj/machinery/portable_atmospherics/canister/update_icon()
  	if(stat & BROKEN)
  		cut_overlays()
  