Update Readme.

README.md

@@ -3,6 +3,8 @@ Python Telegram bot api.
 
 ## Example
 
+* Send Message
+
 ```python
 import telebot
 
@@ -12,3 +14,27 @@ tb = telebot.TeleBot(TOKEN)
 # tb.send_message(chatid,message)
 print tb.send_message(281281, 'gogo power ranger')
 ```
+
+* Echo Bot
+
+```python
+mport telebot
+import time
+
+TOKEN = '<tonke_string>'
+
+
+def listener(*messages):
+    for m in messages:
+        chatid = m.chat.id
+        text = m.text
+        tb.send_message(chatid, text)
+
+
+tb = telebot.TeleBot(TOKEN)
+tb.get_update()  # cache exist message
+tb.set_update_listener(listener)
+tb.polling(3)
+while True:
+    time.sleep(20)
+```