Depends on which set of two black keys you are referring to
like the movie or the cartoon people say is anime even tho it isn't
Answer:
Not sure but it looks like there's a bunch of shading, and color-contrasting done in the artwork. There's some shadowing and details in the tree's leaves. Cool colors were used (from the color wheel) and the artist for sure used triangular tips for most edges.
Explanation:
Is this a question or are you just stating that
