This is just fan-art, so there isn't really instructions required. Just... listen to the music and enjoy, I guess.
The character is from Undertale, (Which I assume you know if you found my account,) and the music is also from Undertale. The music plays when you fight Undyne in Neutral or Pacifist, and it is called 'Spear of Justice.' I used the programs pixlr (pixlr.com), and iPiccy. (iPiccy.com).
