gistfile1.txt

    function* fibonacci([x, y], a, b) {

      yield [x, y]
      yield [x + 2*b - 3*a, y + 4*a - 2*b]

      yield [x + a, y + a]
      yield [x + 2*b - a, y + b - a]

      yield [x + a + b, y - b + a]
      yield [x + 2*a, y - (a + b)]

      yield [x, y - 2*b]
      yield [x - 2*b, y - (2*b - a)

      yield* fibonacci([x - (2*b + a), y + a], 2*a + 3*b, 3*a + 5*b)
    }

    function* take(n, g) {
      for (const _ of Array.from({length: n})) {
        const {value, done} = g.next()

        if (done) {
          return
        }

        yield value
      }
    }