save project

my_tree.py

 import turtle
 import random
+pen = turtle.Turtle()
+pen.color('sienna')
+# 画布大小
+w = turtle.Screen()
+w.bgcolor('wheat') 
+# 移动到起点
+pen.left(90)
+pen.up()
+pen.backward(150)    # 后退
+
+
 def tree(n):
     if n >= 0:
         if n <= 12:
@@ -24,16 +35,6 @@ def tree(n):
             
         
 
-pen = turtle.Turtle()
-pen.color('sienna')
-# 画布大小
-w = turtle.Screen()
-w.bgcolor('wheat') 
-# 移动到起点
-pen.left(90)
-pen.up()
-pen.backward(150)    # 后退
-
 
 tree(100)
 turtle.done()
\ No newline at end of file