Please explain, I'm having a hard time understanding this.

Question

https://code.sololearn.com/c3891JgcecF2/?ref=app

Explain in simple terms how it works. I understood like this: x=0 Consol.WriteLine(42), x=1 Consol.WriteLine(42), x=2 Consol.WriteLine(42), x=3. explain very simply how the cycle and the number count are interconnected, I can’t imagine it in my head, please explain how it works visually. And what happens if you change Console.WriteLine(y) and x++