Multithreading means I can run two methods at once right? If so, how can I apply multithreading to this code snippet?

if(playedSong.get_name_of_song().contains(sd)) //1st
{
SkrillexDamian.play();
}

countDown(convertTime(input)); //2nd


Thank you sincerely,
littlepresman

--- Update ---

If I am totally wrong in assuming multithreading will help me in accomplishing my goal of running the countDown and playedSong at the same time, what will? Any help is much appreciated, and if you need to see more of my code just let me know.

Thanks again,
littlepresman