After being inspired by @Oystir
earlier asking me questions of how to do an enemy health bar like [||||---], I went ahead and made a fancy colored one, which each bar representing 10%.
All you have to do is download the .mpackage file which I am hosting on Dropbox. It only works in mudlet, and once you're connected to Imperian in mudlet, you click Package Manager, then click Install, and then navigate to wherever you installed it, and click it and off you go.
PS: You must config mobdamage on to use this.