save project

my_tree.py

 import turtle
 
+
+def Draw(long, max=10):
+    if long >= max:
+        pen.forward(long)
+        pen.right(30)
+        Draw(long - 10)
+        pen.left(60)
+        Draw(long - 10)
+        pen.right(30)
+        pen.up()
+        pen.backward(long)
+        pen.pendown()
+
+
 pen = turtle.Turtle()
 pen.color('sienna')
 # 画布大小
@@ -12,11 +26,8 @@ pen.up()
 pen.backward(150)    # 后退
 pen.down()
 
-turtle.done()
 
-def Draw():
-    pen.forward(150)
-    pen.penup()
-    pen.backward(150)
+Draw(100)
+
 
-Draw()
\ No newline at end of file
+turtle.done()