auto save

my_tree.py

@@ -7,11 +7,13 @@ w = turtle.Screen()
 w.bgcolor('wheat')      # wheat小麦
 w.bgcolor('wheat')      # wheat小麦
 
 
 # 移动到起点
 # 移动到起点
-
+pen.left(90)
+pen.up()
+pen.backward(150)    # 后退
+pen.down()
 
 
 def tree(n):
 def tree(n):
     if n>= 50:
     if n>= 50:
-
         pen.forward(n)
         pen.forward(n)
         pen.right(30)  
         pen.right(30)  
         tree(n-10)
         tree(n-10)
@@ -19,15 +21,10 @@ def tree(n):
         tree(n-10)
         tree(n-10)
         pen.right(30)
         pen.right(30)
         pen.up()
         pen.up()
+        pen.backward(n)
+        pen.down()
 
 
 
 
-    pen.left(90)
-    pen.up()
-    pen.backward(150)
-    pen.done()
-
-
-
-
+tree(100)
 
 
 turtle.done()
 turtle.done()