save project

my_tree.py

@@ -12,4 +12,29 @@ pen.up()
 pen.backward(150)    # 后退
 pen.backward(150)    # 后退
 pen.down()
 pen.down()
 
 
+#pen.forward(100)
+#pen.right(30)
+#pen.forward(50)
+#pen.forward(-50)
+
+#pen.left(60)
+#pen.forward(50)
+
+#pen.forward(-50)
+#pen.right(30)
+#pen.forward(-100)
+
+
+def tree(n):
+    if n>=50:
+        forward(n)
+        right(30)
+        forward(n-50)
+        left(30)
+        up()
+        backword(n)
+        down()
+
+   
+tree(100)
 turtle.done()
 turtle.done()