Variable campaign / layout

Hello, someone tried to implement a campaign with variable layouts?

For example, I have a screen which displays up to 5x 15-second spots.
I need to implement something like counter for a loop.

  • Round 1 : 1 > 2 > 3.1 > 4 > 5.1
  • Round 2 : 1 > 2 > 3.2 > 4 > 5.2
  • Round 3 : 1 > 2 > 3.3 > 4 > 5.1
    … and others in the same sense

Thank you very much for your advice.