save project

my_tree.py

@@ -11,20 +11,45 @@ pen.left(90)
 pen.up()
 pen.backward(150)    # 后退
 pen.down()
-
-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.down()
-pen.right(30)
-pen.up()
-pen.backward(100)
-pen.down()
+pen.speed(100)
+def t(n):
+    if n>=0:
+        pen.forward(n)
+        pen.right(30)
+        t(n-10)
+        pen.left(60)
+        t(n-10)
+        pen.right(30)
+        pen.up()
+        pen.backward(n)
+        pen.down()
+t(60) 
 turtle.done()
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