The right portion of the screen saver shows the currently computed structure of the protein your computer is working on. The collection of small spheres represent some of the atoms in the protein molecule. At first, there is no display of this protein until the computation has progressed. The initial display rendering is with the atoms stretched out in a flat plane. However, as computation proceeds this turns into a three dimensional shape which is shown rotating for more clarity.
What does the progress bar in the screen saver represent?
The progress bar, towards the bottom of the screen saver, represents approximately how much of the current task your device has processed. When it reaches 100%, the computation is complete and the results will then be sent back to World Community Grid, where they will be packaged and delivered to the Microbiome Immunity Project researchers.