ochalmers's post in DrawSVG always starts at 3'oclock. How to change it to start at 12'oclock? was marked as the answer
Bit of a hack but you can rotate the circle
See the Pen KrZwZK by olichalmers (@olichalmers) on CodePen
ochalmers's post in Sprite sheets, tweenmax question on scroll was marked as the answer
It is definitely worth checking out ScrollMagic as has been mentioned above - it's amazing. Check out this demo they have on their site.