@yaujiet I fixed your post as per the directions…
Now you need to read and study the Documents and Help Center files and get your code out of the void loop in order for it to work with Blynk properly.
http://help.blynk.cc/getting-started-library-auth-token-code-examples/blynk-basics/how-to-display-any-sensor-data-in-blynk-app