But control it how? Sliders? Equations? Points you drag around? External text file data?
You can generate a list if increasing numbers using the Series component (1,2,3,4,...). These numbers can then be treated as the distances between your shapes. To go both left and right, you can take that series and negate it (-1,-2,-3,-4,...).
To convert these spacings to motions, you’ll have to use Mass Addition and rely on the partial result output. This will be (1,1+2,1+2+3,1+2+3+4,...) or (1,3,6,10,...). These partial results can be used to set up a bunch of move vectors.
@danielbent used that mass addition trick in his file too.