Nope, nope, nope, nope… 
When using Blynk.begin() don’t worry to much about re-connection routines until you have better understanding… then look here and at the Documentation about Blynk.config()
Otherwise… just keep a basic void loop()
void loop() {
Blynk.run(); // needed here for Blynk stuff... can be excluded (via logic check) if connection fails, in-order to expedite non connected functionality until re-connection occurs.
timer.run(); // needed here for timers (if used)... never exclude! (if using timers)
}