Implement the drawDragon function in main.js to draw a dragon curve of degree n.
The Dragon Curve is a fractal curve that comes from iterating a family of curves.
For degree n=0, the curve is a single line segment.
For degrees n>0 the curve looks like this:
To go from degree n to degree n + 1, replace each segment in the previous curve with 2 segments at right angles as in the image. Notice to which side of the line the new segments are placed.
Fun fact: you can also get this curve by repeatedly folding a strip of paper in half n times and unfolding each fold to 90 degrees.