save project

my_tree.py

@@ -11,13 +11,17 @@ pen.left(90)
 pen.up()
 pen.backward(150)    # 后退
 pen.down()
-pen.forward(100)
-pen.right(30)
-pen.forward(50)
-pen.backward(50)
-pen.left(60)
-pen.forward(50)
-pen.backward(50)
-pen.right(30)
-pen.backward(100)
+def tree(n):
+    if n >= 50:
+            pen.forward(100)
+            pen.right(30)
+            tree(n-10)
+            
+            pen.left(60)
+            
+            tree(n-10)
+            pen.right(30)
+            pen.backward(100)
+tree(80)
 turtle.done()
+