Click the flag to start. Click the "Generate Algorithm" button to generate the first dragon curve. Then click it again. And again. Click on the "Reset" button to reset the algorithm.
The Dragon Curve is made when you fold a piece of paper in half over and over and then unfold each fold to 90 degrees. Watch how the first line unfolds into two lines, then those lines unfold into four. When you get to the really huge levels, you should run this project in Turbo Mode. Shift + click on the green flag to enter Turbo Mode.