I know Blynk professed “No programming needed”, but the fact is that is more marketing & less reality. Yes, some stuff can be done with minimal programming… but rarely is that good enough for actual needs.
It is mostly bog standard Arduino style programming, so thousands of tutorials out there.
As for the Blynk specific Library stuff… lots of examples and documentation here for that… Scroll up to the top of this page and start clinking on the Docs, Help Center and Sketch Builder links for that.
You want our assistance, you get our personalities…
Honestly, we (fellow forum members that VOLUNTARILY take our time and effort to respond) do get very sick and tired of the constand “I searched all over the world and can’t find any help” type messages from self proclaimed noobs, as if that was a badge of righteousness, deserving of hand holding or something.
And yes, I was even one of those asking for more code examples (at the time we didn’t have the resources Blynk has since made availed) but after some “gentle” urging of others, I quickly buckled down and exercised my Google Fu 
And so can you 
PS, here are a bunch of examples i have been building that may give you something to experiment with for “How to code with virtual pins”