This is the first of four abstract drawings posted (in no particular order). I’ve created dozens of drawings that all begin the same way, with a sweeping set of lines. Then I added supplemental lines to create shapes. Finally I filled or decorated some of the enclosed shapes.
Other than using marker colors that were opposites on the color wheel, there really wasn’t much planning. It’s the contrast between these complimentary colors that can add drama to design. A classic example, is the Red/Green color combination used for Christmas decorations.