Thanks for the welcome @Carl @OSUblake and great info with examples. So, I start to understand that the scrollbar sends its position to the timeline to control its animation, but where does the timeline/tween live? On my example site where does that large block text 'live'? I can't see it in any of the source. And how is it authored? Is there a tool like Flash (old school) with a timeline that you export to code? I think I'm not grasping something basic…
Thanks.