Plot 50+ coordinates in order, then connect them. A long-necked dinosaur stretches across the page. Coordinates make pictures.
Why it works
Every (x, y) is a point. Connect them in order, and you get a path. Pick the points carefully and that path looks like anything you want.
Try drawing your own creature first: sketch it on graph paper, then list the coordinates. That's how all polygon graphics work — including video games.