Hi. It would be great if someone could suggest me a technique in the following task.

There is a character which should be able to juggle the playing cards. I need these cards to follow motion path, but with an offset (first card starts moving, few frames later second card is moving and so on...) where each uValue is driven by a single custom attribute. I mean I need this animation play not through timeline, but while changing a value of a custom attribute.

I am not skillful enough in expressions, I've already tried few techniques using plusMinusAverage nodes, expressions, driven keys. But unfortunately every time I got a weak result.

There is a good example of what I mean on youtube.http://www.youtube.com/watch?v=iMIGFoYspTk

I couldn't recieve any response from this rigg's author anyway.

Here is my concept: