I have not really used this technique before and I wanted to have a go because I really like the effect it produces. So here are my explorations! 

For this piece I mapped out the layout on a scrap piece of paper first because I helped me keep track of what section I should be painting when. I'm really happy with how this one turned out:

Thank you Ashley for a very enjoyable class and introducing me to a technique which I will definitely be using more of!