save project

my_tree.py

@@ -12,4 +12,28 @@ pen.up()
 pen.backward(150)    # 后退
 pen.down()
 
+def tree(n):
+    if n>=10:
+        pen.forward(n)
+        pen.right(30)
+        tree(n*0.5)
+        pen.left(60)
+        tree(n*0.5)
+        pen.right(30)
+        pen.up()
+        pen.backward(n)
+        pen.down()
+#pen.forward(100)
+
+#pen.right(30)
+#pen.forward(70)
+#pen.backward(70)
+
+#pen.left(60)
+#pen.forward(70)
+#pen.backward(70)
+
+#pen.right(30)
+#pen.backward(100)
+tree(100)
 turtle.done()