Recursion

 Another day, another problem. The little tree below is

done through recursion. Trying to follow the code...                       

                    

mport turtle
screen = turtle.Screen()
screen.setup(500, 500)
class TreeNode(object):
    def __init__(self, val, left=None, right: object = None):
        self.val = val
        self.left = left
        self.right = right
from turtle import *

reset()
color("green")
speed(2)
seth(90)
shape('turtle')

def tree(size):
    if size < 10:
        return
    fd(size)
    lt(30)
    tree(size * 0.6)
    color('hotpink')
    rt(60)
    tree(size * 0.6)
    color('blue')
    lt(30)
    bk(size)

tree(100)
turtle.mainloop()

I've even tried changing the code :

Or again:

Teaching Kids Programming – Draw a Tree in Python using Turtle Graphics (Recursion) | Algorithms, Blockchain and Cloud (helloacm.com)