Add another sentence to the statement you made. You can explain it further, comment on it, or twist it into absurdity.
Then begin again. “There is no such thing as…”
Continue down the page that way, describing the impossible and expounding upon it.
If you find this hard to do, close your eyes, relax your mind, and loosen it from its grip on the way things ought to be.
Add illustration and color to your page if you wish. Give your work a title.