i've been admiring another award winning site https://elephant.is/ and managed to get a fairly decent transition using ScrollToPlugin (once I solved the state issue by wrapping the code in a javascript document.onload function).
ScrollTrigger seems a bit less successful.
There is an problem reversing the sequence going from red (section 3) back to purple (section 2) and the general "feel" isn't quite right.
Not sure whether I should try using a "smooth scroll" so advice a