Motion edit prompt

Start from the provided frame-0 isometric cube arrangement with no setup changes. Animate the cubes only with smooth eased translation, keeping every cube upright with no rotation, scale change, or fading. Treat the eight cubes as four vertical two-cube stacks: the top/center stack, the left stack, the right stack, and the center/bottom stack; the two cubes that occupy the middle at the start should separate as the motion begins. Keep the two cubes in each stack locked together with the same vertical spacing while the stacks glide around an invisible diamond-shaped cycle, with cube corners touching at single points whenever stacks meet and with no overlaps. The top/center stack moves up-left by about one cube-edge length first, then slides straight right by about one cube width, or two cube-edge steps sideways, across the upper row, and finally returns down-left to where it sits in the provided SVG. The left stack moves up-left by about one cube-edge length first, then travels straight downward by about one cube-edge length along the left side, then returns up-right by about one cube-edge length to where it sits in the provided SVG. The right stack moves down-right by about one cube-edge length first, then travels straight upward by about one cube-edge length, roughly half a cube's height, along the right side, then returns down-left by the same amount to where it sits in the provided SVG. The center/bottom stack moves down-right by about one cube-edge length first, then slides straight left by about one cube width, or two cube-edge steps sideways, across the lower row, and finally returns up-right to where it sits in the provided SVG. All four stacks animate simultaneously, share the same period, reach each turn in the path together, and complete one loop together. Maintain the existing isometric view throughout: translations stay on straight grid-aligned directions matching the cube's isometric axes, with angles like 30, 60, 90, and 120 degrees where applicable. The overall loop should make the compact central lattice spread into two separated staggered groups, open into a wider symmetrical arrangement, continue shifting past that alignment, and close back into the original clustered formation.