auto save

my_tree.py

 import turtle
-def tree(n):
-    if n>=50:
-        pen.forward(n)
-        pen.right(30)
-        tree(n-10)
-        pen.left(60)
-        tree(n-10)
-        pen.right(30)
-        pen.up()
-        pen.backward(n)
-        pen.down()
-        pen.hideturtle()
+import random
 pen = turtle.Turtle()
 pen.color('sienna')
 # 画布大小
@@ -22,4 +11,16 @@ pen.left(90)
 pen.up()
 pen.backward(150)    # 后退
 pen.down()
-tree(100)
\ No newline at end of file
+pen.forward(150)
+pen.right(30)
+pen.forward(50)
+pen.up()
+pen.backward(50)
+pen.left(60)
+pen.down()
+pen.forward(50)
+pen.up()
+pen.backward(50)
+pen.right(30)
+pen.backward(150)
+turtle.done()