GUIBars is a BYOND Library that allows you to display a number of graphical "bars" that indicate a "current of maximum" type of statistic. I originally developed it for use as damage indicators in Seed: Third Tower. I've submitted it to the BYOND hub because I thought others may find it useful. Full code including a readme are present in the zip file below.
v1.1 adds the missing removeBar proc and cleans up the demo stuff. Warning: You may need to manually delete your old directory manually to see the demo file cleanup.