To create a project with blynk one must be familier with Blynk and how to code for ESP32 board in arduino IDE to accomplish it is recommend to go through this youtube tutorial https://www.youtube.com/watch?v=IKbbvEzZ7wg
As mentioned in the tutorial after you import the following library https://github.com/blynkkk/blynk-library What you can do is simply edit your main file "Edgent_ESP8266.ino" by taking refrence of file added to this repo.
Here is my Project https://www.youtube.com/watch?v=X_sJe7SSA-U&t=1s