auto save

my_tree.py

 import turtle
 import random
-
 pen = turtle.Turtle()
 pen.color('sienna')
 # 画布大小
@@ -16,8 +15,10 @@ pen.down()
 
 def tree(n):
     if n >=50:
+        pen.size(n/10)
         pen.forward(n)
-        
+        angle=random.randint(0,30)
+        length=random.randint(1,15)
         pen.right(30)
         tree(n-10)
         pen.left(60)
@@ -26,7 +27,7 @@ def tree(n):
         pen.up()
         pen.backward(n)
         pen.down()
-        pen.speed(100)
+        pen.speed(500)
 
 tree(100)
 turtle.done()