DRAWING GUM MAKES A GORGEOUS PATTERN!

This design on paper was SO000 easy to do, and it looks rather striking, yes? I used plain old manila paper (sort of yellow-tan).
Drawing gum is a masking fluid. I put a blob of it on the paper and blew it around through a drinking straw. Thus the branching lines.
When a few moments had passed, I gently washed with blue watercolor (dye would work, too), over the entire page. It turned greenish on the yellowish paper.
After that was dry, I rubbed the drawing gum off with my thumb.