Predictably, everyone attacked this challenge in different ways:
Dane was very methodical and carefully explored his colours on the paper towel before to committing to them on his paper.
Bekah did her colour mixing directly on her final paper
but gradually used less paint on each square.
Levi did a dry-run on his paper towel first (mixing the colours in a square shape) and then did an exact replica on his final paper.
Matt went for lots of colour on his paper towel and final paper.
And, Sarah, she just went for it!