Yes that's what we called it back in college. Scrambling. All you need to do is to scramble a rough pattern onto your work surface with a pencil.
I used normal card paper.
I have done this before, filling the entire spaces of the resulting pattern with either monochromatic or analogous colors. This time however, I chose to fill in only a few spaces and then erase the remaining pencil lines.
I did plan to use paint but while I was looking for my black paint In the box I got hold of a black permanent marker..and changed my mind.
This was much quicker like 2 minutes!
Simple piece of bold abstract art. Totally my style!