Is it possible to sequence (merge) segments?

I have 72 nodes.
Segment 1 : 0 - 54, grouping = 3, spacing = 0
Segment 2 : 54-72 grouping - 1, spacing - 0

I want the effect to start with Segment 1, then Segment 2

Instead of Segment 1 and Segment 2 in parallel.

Is this possible?
Thanks

No. Segments are individual units.