auto save

my_tree.py

@@ -5,11 +5,26 @@ pen.color('sienna')
 # 画布大小
 w = turtle.Screen()
 w.bgcolor('wheat')      # wheat小麦
-
 # 移动到起点
 pen.left(90)
 pen.up()
 pen.backward(150)    # 后退
 pen.down()
+pen.speed(0)
+
+def tree(n):
+    if n >= 50:
+        pen.fd(100)    
+        pen.rt(30)
+        tree(n-10)
+        pen.lt(60)
+        tree(n-10)
+        pen.rt(30)
+
+
+        pen.up()
+        pen.bk(100)
+        pen.dowm()
 
-turtle.done()
+tree(100)
+turtle.done()
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