How to iterate through a dataset until a subset of a certain size is created?

Alyssa_68

I'm trying to do something fairly simple (I think) in modelbuilder but I can't wrap my head around how the iterators and logic operators work. Basically, I have a dataset with thousands of points and I want to randomly select one point, then select all the points within a certain distance and store them in a new feature class. The model I've built (picture attached) accomplishes this task up until this point. However, I would like this process to continue repeating itself until the new feature class has a certain number of rows. I was thinking of using the "If Row Count Is" operator, but I don't know where exactly to add it or how to point it to the steps I want repeated. Any help would be appreciated!

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SiqiLi

The selection part can go in between While and Append tool.

In the image below, 

• The If Row Count Is tool checks whether the "Target" dataset has over 200 rows.
• If row count is greater than 200, the model stops running.
• If row count is less than or equal to 200, 
  Frist, select one row from "points" dataset which has the smallest RandID.
  Use this point as Selecting Features in the Select Layer By Location tool to select "points" within 100km.
  Selected points from the Select Layer By Location tool are appended to the "Target" dataset and removed from "points" dataset.
• Then the model checks whether the "Target" dataset has over 200 rows. If not, repeat the above process.