Hi Dan
For the fades, lets start with 150 pixels either side of the final positions:
Circle 1: 0,568
Fade out/in: -150, 568
Circle 2: -640,568
Fade in/out: -790,568
Fade in/out: -490, 568
Circle 3: -1280, 568
Fade in/out: -1130,568
Fade in/out: -1430, 568
I can amend the expression with further circle co-ordinates.
Thanks very much Dan