Dragon Curve generator

$ python3.10 dragon.py 10
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$ python3.10 dragon.py --help
usage: dragon.py [-h] [--turns-only] [--x-step X_STEP]
                 [--y-step Y_STEP] [--initial-direction {R,D,L,U}]
                 DEPTH

Draw a dragon curve.

positional arguments:
  DEPTH                 Depth of the dragon curve to generate

options:
  -h, --help            show this help message and exit
  --turns-only          Instead of drawing the curve, output the turns
                        necessary for cli-draw to draw the curve
                        (default: False)
  --x-step X_STEP, -x X_STEP
                        The number of columns a single x-axis step
                        takes. (default: 2)
  --y-step Y_STEP, -y Y_STEP
                        The number of lines a single y-axis step
                        takes. (default: 1)
  --initial-direction {R,D,L,U}, -d {R,D,L,U}
                        The starting direction of travel. (default: R)