How to make object jitter or vibrate in place

Hello all:

I am modeling some molecules that need to randomly jitter or vibrate in 3D space, something similar to extremely rapid Brownian motion. Is there a short script available for that that I could apply to an object or an asset that I can get that would help me do that? Can anyone provide me with some guidance as to how to write my own script for that? I'm not much of a C# programmer yet but I'm learning.

Thanks