auto save

my_tree.py

@@ -13,17 +13,18 @@ pen.backward(150)    # 后退
 pen.down()
 
 
+def tree(n):
+    pen.forward(n)
+    pen.right(30)
+    tree(n-10)   #forward(n)+right(30)
+    pen.left(60)
+    tree(n-10)
+    pen.right(30)
+    pen.up()
+    pen.backward(n)
+    pen.down()
+
+
+
 
-pen.forward(50)
-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(50)
 turtle.done()