save project

my_tree.py

 import turtle
-import time
-import random
-import pygame
-time1=time.time()
-pen = turtle.Turtle()
 
+pen = turtle.Turtle()
+pen.color('sienna')
 # 画布大小
 w = turtle.Screen()
 w.bgcolor('wheat')      # wheat小麦
-l=['snow','lightcoral']
-pen.speed(10000000000)
-a=l
-def aaa(n):
-    if n >=0:    
-        if n<=15:
-
-            pen.pensize(n)
-            pen.pencolor(random.choice(a))
-        else:
-            pen.pensize(n/10)
-            pen.color('sienna')
-        l=random.randint(5,15)
-        g=random.randint(15,20)
-        pen.forward(n)  
-        pen.right(g)
-        aaa(n-l)
-        pen.left(g*2)
-        aaa(n-l)
-        pen.right(g)
-        pen.up()
-        pen.backward(n)
-        pen.down()
 
 # 移动到起点
 pen.left(90)
 pen.up()
-pen.backward(450)    # 后退
+pen.backward(150)    # 后退
 pen.down()
-aaa(80)
-time2=time.time()
-print(time2-time1)
+
+pen.forward(100)    #绘制二叉树
+pen.right(30)
+pen.forward(50)
+pen.backward(50)
+pen.left(60)
+pen.forward(50)
+pen.backward(50)
+pen.right(30)
+pen.backward(100)
+
 turtle.done()