Try to play diagonally, up and to the right. It's easier to grasp the harmonic effect, when you're first trying it out. A bit more info and a gif are in the rep

Try to play diagonally, up and to the right. It's easier to grasp the harmonic effect, when you're first trying it out. A bit more info and a gif are in the repository readme[1]. 1: https://github.com/Some1Else/qwerkey https://github.com/Some1Else/qwerkey