auto save

my_tree.py

@@ -12,4 +12,12 @@ pen.up()
 pen.backward(150)    # 后退
 pen.backward(150)    # 后退
 pen.down()
 pen.down()
 
 
-turtle.done()
+
+def tree(n):
+    turtle.forward(n)
+    turtle.right(30)
+    turtle.forward(n/2)
+    turtle.left(80)
+    turtle.forward(n/2)
+tree(300)
+turtle.done()
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