Ok, seeing as I want to use a multicolored pet gauge in my new UI which is super high performance, I'm going to go over my own code and make a "perfect" version that uses as little coding and processing power as possible.
After I finish it (uhm, maybe in a couple days, I'm also finishing up ACUI and am moving in real life currently) I'll explain it in thoughrough detail in this thread, and maybe make a tutorial in some section of the messageboards, you know, where tutorials go. Or something.
P.S. - It's like 2 am and I'm packing boxes. Weeeee...
P.P.S. - Kjan, I'm pretty sure the coding for a color changing gauge would make it impossible for it to be stretchable.