First make a family and load it into your environment.
Then place the first two rows of family instances along the divided curve.
Offset the curve startpoint by 1/2 a step, and then repeat for the next two rows.
This thread shows spacing and rotating families along a curve.
The old Dynamo instructional videos had a similar example of placing a family according to a divided surface (aka your backup wall).
That workflow can be adjusted to meet the needs of the job or family, but we (the community) need some additional info from you such as:
- Revit file with the approximate extents of the wall.
- Family with the build of your block.
- Dynamo graph and a screenshot which indicates where you got stuck.