Clones within clones on a spline

HI looking for a way to take a row of sphere, that are built in a clone, then multiply that clones with the spheres, and have many rows of spheres all animating along a spline. I have the basic idea, but would like them following each other, with the same distance apart as they turn corners. Thats where I seem to run into issues, using a random effector only separates depending on the axis they are on. Tried Step and Delay, missing something. Attached where I’m stuck with it and a bad drawing of it.
Thanks much!
Jon Lewis