Square fractal

squares.py

from math import tan, radians, sqrt

from python.common.Turtle import Turtle


def squares(depth=50, angle=86, size=500):
    t = Turtle()
    length = size
    for i in range(depth):
        for _ in range(4):
            t.forward(length)
            t.right(90)

        movebit = length * tan(radians(angle)) / (1 + tan(radians(angle)))
        length = sqrt((length - movebit) ** 2 + movebit ** 2)
        t.forward(movebit)
        t.right(angle)

    t.export("squares")


squares(angle=70, size=900)