save project

my_tree.py

@@ -12,20 +12,17 @@ pen.up()
 pen.backward(150)    # 后退
 pen.down()
 pen.pensize(5)
-def s():
-  pen.forward(100)
-  pen.right(30)
-  pen.forward(50)
-  pen.up()
-  pen.backward(50)
-  pen.down()
-  pen.left(60)
-  pen.forward(50)
-  pen.up()
-  pen.backward(50)
-  pen.right(30)
-  pen.backward(100)
-  pen.down()
+def s(n):
+  if n>=50:
+        pen.forward(n)
+        pen.right(30)
+        s(n-10)
+        pen.up()
+        pen.left(60)
+        s(n-10)
+        pen.right(30)
+        pen.backward(n)
+        pen.down()
 s()
 
 turtle.done()