This video explains what this exercise is, and the basics of how to do it
This video walks you through the process more clearly and shows other ways of doing the exercise
~Simply grab a sheet of paper—it can be a page from an old paperback book, newspaper, magazine, or anything with markings—and place dots on specific words or letters. You choose what set of marks, words, or letters you want. Then connect the dots with curved, zigzag or straight lines to create a pattern. These exercises reveal hidden patterns in negative space, show you how choices can make a difference and will help you engage in randomness to take your work a few steps further.
~If you like, you can use tracing paper on top of the book page/magazine etc.. so that you are not marking on the actual page. This will allow you to use anything around you and will give you a totally different and more clean looking piece when you are done.
~As a more challenging variant, you can start with a blank page and find imperfections or stray marks to use rather than something printed on the page.