In NetLogo Behaviour Space, how can I vary two variables simultaenously?

[Zee]

I have two reactions, themes 1 and 2. I want to run an experiment in NetLogo wherein both themes 1 and 2 are changing in the same experiment as:

First data point: Theme 1: 0, Theme 2: 0
Second data point: Theme 1: 10, Theme 2: 0
Third data point: Theme 1: 0, Theme 2: 10
Fourth data point: Theme 1: 10, Theme 2: 10

How can I do that?