Source google image: https://vignette.wikia.nocookie.net/undertale/images/c/cd/Boxpuzzle.png/revision/latest/scale-to-width-down/180?cb=20160212132851
Piano puzzle undertale
Source google image: https://vignette.wikia.nocookie.net/undertale/images/c/cd/Boxpuzzle.png/revision/latest/scale-to-width-down/180?cb=20160212132851