This is a library for making bubbling meters like the one found at "http://www.nongnu.org/bubblemon/".
The library accepts numbers as input for the different visualizations (water-level, color, amount of bubbles, amount of growth from the bottom, whether something is floating in the water).
It can then render a picture of it that you are responsible for passing to the screen (or whatever you want to do with it). As long as you render an image at least 10 times per second, the animation will be smooth.
These details are provided for information only. No information here is legal advice and should not be used as such.