{
  "axiom": "F[-ff+R]F[++N]F[-ff+R]F[+N]F[-ff+R]F[+N]F[++N]",
  "rules": {
    "N": "F[+++N][++N][+N]FN",
    "R": "F[++N][++++N]R"
  },
  "angle": 20,
  "iterations": 5,
  "start_heading": 90
}