auto save

my_tree.py

 import turtle
 import random
 
+turtle.speed(0)
 pen = turtle.Turtle()
 pen.color('sienna')
 # 画布大小
@@ -15,12 +16,14 @@ pen.down()
 
 def tree(n):
     if n>=0:
-        pen.fd(n)
-        pen.right(30)
-        tree(n-10)
-        pen.left(60)
-        tree(n-10)
-        pen.right(30)
+        pen.fd(n/10)
+        angle = random.randint(0,30)
+        length = random.randint(1,15)
+        pen.right(angle)
+        tree(n-length)
+        pen.left(angle*2)
+        tree(n-length)
+        pen.right(angle)
         pen.up()
         pen.backward(n)
         pen.down()