A curtain family that (kinda) opens and closes …

This is an example of an family with an array that kinda mimics a curtain that opens and closes.

However – it is also a good example of what happens if you don’t create a fix for when an array drops to only one item.  You need to formulaically stop this from happening, by doing something like this:

Applied Array=if(Calculated Array>1,Calculated Array,2)

(where Applied Array is the parameter applied to the physical array in the family, and Calculated Array is the number that is formulaically derived)

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