Actually I'm so blur. If I've just programming something, then what happened? What is it use for?

Answer 1

For practice, keep doing that and try to avance and challenge yourself while learning more and more😉

Answer 2

Nothing, you've just proven yourself you were capable of doing it and, I hope, you had fun doing it :)

Answer 3

maybe you can make it your job, or make gamez for yourself or tools to make your life simpler.