save project

my_tree.py

@@ -11,11 +11,16 @@ pen.left(90)
 pen.up()
 pen.backward(150)    # 后退
 pen.down()
-pen.forward(100)
-pen.left(30)
-pen.forward(50)
-pen.left(180)
-pen.forward(50)
-pen.left(120)
-pen.forward(50)
+def d(n):
+    if n>=50:
+        pen.forward(n)
+        pen.right(30)
+        d(n-10)
+        pen.left(60)
+        d(n-50)
+        pen.right(30)
+        pen.up()
+        pen.backward(n)
+        pen.down()
+d(10000)
 turtle.done()