How does sololearn work?? Sololearn tell us

Question

If sololearn is about teaching everything about coding, how did the programmers code this entire platform so that when you choose the wrong answer it make a loosing sound, while you get the answer right it make the winning sound.

Answer 1

https://www.sololearn.com/post/129437/?ref=app

https://code.sololearn.com/WKKkpq0efxai/?ref=app