There are eight legs. The front two pairs are held close together.
"Om" is the underlying sacred, primal, sound of the universe, in Sanskrit. "Shanti" means something roughly close to "peace" or "pure consciousness."
"Om shanti shanti om" is one version of that. Here's another version if you'd like to listen for 4 minutes:
https://www.youtube.com/watch?... Listen quietly and it will lower your blood pressure.