auto save

my_tree.py

 import turtle
-
+import random
 pen = turtle.Turtle()
 pen.color('sienna')
 # 画布大小
@@ -13,8 +13,10 @@ pen.backward(150)    # 后退
 pen.down()
 pen.speed(0)
 def tree(n):
-    if n>=-10:
+    if n>=0:
         pen.forward(n)
+        angel=random.randint(0,30)
+        = random.
         pen.right(30)
         tree(n-10)
         pen.left(60)