instancias de base de tortuga

import turtle as T
import random
import time

# 画樱花的躯干(60,t)
def Tree(branch, t):
    time.sleep(0.0005)
    if branch > 3:
        if 8 <= branch <= 12:
            if random.randint(0, 2) == 0:
                t.color('snow')  # 白
            else:
                t.color('lightcoral')  # 淡珊瑚色
            t.pensize(branch / 3)
        elif branch < 8:
            if random.randint(0, 1) == 0:
                t.color('snow')
            else:
                t.color('lightcoral')  # 淡珊瑚色
            t.pensize(branch / 2)
        else:
            t.color('sienna')  # 赭(zhě)色
            t.pensize(branch / 10)  # 6
        t.forward(branch)
        a = 1.5 * random.random()
        t.right(20 * a)
        b = 1.5 * random.random()
        Tree(branch - 10 * b, t)
        t.left(40 * a)
        Tree(branch - 10 * b, t)
        t.right(20 * a)
        t.up()
        t.backward(branch)
        t.down()

# 掉落的花瓣
def Petal(m, t):
    for i in range(m):
        a = 200 - 400 * random.random()
        b = 10 - 20 * random.random()
        t.up()
        t.forward(b)
        t.left(90)
        t.forward(a)
        t.down()
        t.color('lightcoral')  # 淡珊瑚色
        t.circle(1)
        t.up()
        t.backward(a)
        t.right(90)
        t.backward(b)

# 绘图区域
t = T.Turtle()
# 画布大小
w = T.Screen()
t.hideturtle()  # 隐藏画笔
t.getscreen().tracer(5, 0)
w.screensize(bg='wheat')  # wheat小麦
t.left(90)
t.up()
t.backward(150)
t.down()
t.color('sienna')

# 画樱花的躯干
Tree(60, t)
# 掉落的花瓣
Petal(200, t)
w.exitonclick()

from turtle import *
from random import *
from math import *

def tree(n, l):
    pd()
    t = cos(radians(heading() + 45)) / 8 + 0.25
    pencolor(t, t, t)
    pensize(n / 4)
    forward(l)
    if n > 0:
        b = random() * 15 + 10
        c = random() * 15 + 10
        d = l * (random() * 0.35 + 0.6)
        right(b)
        tree(n - 1, d)
        left(b + c)
        tree(n - 1, d)
        right(c)
    else:
        right(90)
        n = cos(radians(heading() - 45)) / 4 + 0.5
        pencolor(n, n, n)
        circle(2)
        left(90)
    pu()
    backward(l)
bgcolor(0.5, 0.5, 0.5)
ht()
speed(0)
tracer(0, 0)
left(90)
pu()
backward(300)
tree(13, 100)
done()