Tempo synchronized back & forth tremolo (strings)

Virtual instruments Virtual Effects and Add-ons
1

I’m trying to create quite slow strings tremolo with HSO. The idea is to have the feeling that the strings are pulling the bow back and forth in tempo. Do you have an idea how to achieve this with the best results.

This is how it should sound at the very beginning: Tron Legacy - Soundtrack OST - 04 Recognizer - Daft Punk - YouTube

Thanks!