Click the green flag and press space. TURBO MODE IS HIGHLY RECOMMENDED OTHERWISE RENDERING WILL TAKE A LONG TIME
The Dragon Curve is a fractal where each new iteration is the previous iteration turned 90 degrees added on to the previous iteration. Read More: https://en.wikipedia.org/wiki/Dragon_curve A Dragon Curve: https://bentrubewriter.files.wordpress.com/2012/04/dragon16.png (Found with Google Images)