Hello and welcome to the Blynk Forum. We can give you actual assistance, but we are not a code factory.
There are many reference pages that will guide you in learning to use Blynk... All these links are at the upper right of this page.
Particularly check out the Search function for other TV and IR Control topics:
Sketch Builder: Wherein you will find many examples... such as using a Widget to send data to the Arduino:
Help Center: http://help.blynk.cc
Also, please thoroughly read through the Welcome Topic.