2x2 grid layout feature

[jwright8]

Recently I discussed with FindingFive the possibility of using a 2x2 grid for responses in an incidental learning paradigm. This would enable mouse tracking across four quadrants of the screen, which would also permit a confusion matrix analysis. FindingFive added this possibility via "layout": [2,2]. In that discussion there was a mention of a demo containing this feature. Can you share that demo with us? Thank you.