auto save

my_tree.py

@@ -2,6 +2,8 @@ import turtle
 
 pen = turtle.Turtle()
 pen.color('sienna')
+pen.speed(0)
+
 # 画布大小
 w = turtle.Screen()
 w.bgcolor('wheat')      # wheat小麦
@@ -12,4 +14,19 @@ pen.up()
 pen.backward(150)    # 后退
 pen.down()
 
+def tree(n):
+    if n>=40:
+        pen.fd(n)
+        pen.right(30)
+        tree(n-15)
+        pen.left(60)
+        tree(n-15)
+        pen.right(30)
+        pen.up()
+        pen.backward(n)
+        pen.down()
+tree(100)
+
+
+
 turtle.done()