How do you create random paths in iTween?

Hi, I'm creating a scene that takes place within a human blood cell and I wanted to have random particles flying around in the background to make the scene look fuller. So far, I'd be happy to just get spheres taking random paths but I can't seem to find out how to do that using iTween but I'm sure the ability to do so exists.

Here's the example on the iTween site that I'm sort of trying to recreate: http://itween.pixelplacement.com/examples.php#randomPaths

I've already seen this question too but it didn't seem to make much sense to me: http://answers.unity3d.com/questions/560304/how-to-move-an-object-on-a-random-path-with-itween.html

I've been using C# this entire time so any examples in that language would be great! Thanks!