How do I add another loop to my nested loop

[greenpine]

thanks for the reply,
sorry, if it is confusing.

3 runs are just an example, maybe I should not put it that way.
That is to explain what the file should read when it is time for the next run.

the file is going to be scheduled to run once a day.
so on day one, it should only read and use rows 1 and 2, (of all CSV files), assuming the given range is only 2 rows.
the next day it should read and use rows 3 and 4 ( of all CSV files), and so on for the next run to come, that is what I mean.

there could be hundreds of rows in CSV files, so on each run new data should be read and used.

thanks.