So, I was going to just post this half hour video I had just seen, it's very engaging even to a non musician (I tested that!), and it's about the writing and arranging in The Girl From Ipanema. Then I realised I could make it a challenge, so watch the video, or don't (though it is entertaining), and see if you can write a song with chords and harmony that follows a pattern that isn't according to normal western expectations.
I don't really mean just unusual or awkward, though those would still qualify i suppose, i mean something that sounds "good" or maybe i mean it should sound "understandable", but would cause a music student to scratch their head a bit when asked why it actually works.
Here's the video anyway, enjoy!
https://youtu.be/AZMpU-7YcgA (correct link!)
Oh yeah, and tag your song #nonwestern